Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0b5a90f899b6e8…

MALICIOUS

PDF

122.9 KB Created: 2020-10-03 15:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6265c0be7d83a8e9b52753d895883851 SHA-1: dffe86ac46d154666f056bf2e905b20075bc118a SHA-256: 8b0b5a90f899b6e873ad8a3ab635098fd9e943ade9c065ee96690373a3d10850
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious due to its function as a link farm designed for SEO manipulation. It contains numerous links, including one pointing to a known malicious redirector, and presents itself as a user manual to entice clicks. The document body is filled with URLs and text related to a Sony camera manual, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=sony+rx100+vii+user+manual+pdf In PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/49426873226.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/zojepalovalefebotukafozun.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/30268206483.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/90376711097.pdfIn PDF document text
    • http://files.sctnewsroom.org/uploads/1/3/2/6/132695596/5098404.pdfIn PDF document text
    • http://files.sirrobinson.com/uploads/1/3/0/9/130969391/6270835.pdfIn PDF document text
    • http://files.gardenviewfarmnigerians.com/uploads/1/3/1/4/131407164/xurutip_bobog_litisu.pdfIn PDF document text
    • http://letena.barryfamilystories.com/uploads/1/3/2/6/132682859/eeb7e7c9d087b75.pdfIn PDF document text
    • http://gejuwoxe.saclegalprep.com/uploads/1/3/2/7/132712237/buridulof-nofusavuselazi-fetimowas.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00018b53.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00018b53.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0001cfbe.bin)
    • https://uploads.strikinglycdn.com/files/2ebcb07e-06bd-4d24-9c4d-0fbe5d998c1c/86591827681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3e63c6-561f-4679-8b3b-1abc4fa8f066/76186902816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2561e6ea-e3fd-41d5-a44a-a21c1ceb702d/xusomosatugikarutuviwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697639db-a78f-48bc-b9cc-b8c5b5b05fac/genudijelivojuduboxof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/phil_collins_love_songs_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4892/7900/files/39943413580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93aebc3c-52d3-436e-a03a-8b64c6d8055f/31402070882.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_01_sfnt_off00018b53.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E16 3724 bytes
SHA-256: 0bc2187513754c209a1ff1b79f120b31e782b370bd3c40d674ca37d1cde5bce0
font_01_sfnt_off00018b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B53 5516 bytes
SHA-256: e3dc93b4ad86cf43127da8d05b3b7f9737e672d4a4ee4ccc65f77ff4cbeb13c9
font_02_sfnt_off00019df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DF7 16104 bytes
SHA-256: d2e28896a872a87a0291f787f1e4b581999d58170e1cf74be68d082ecc3f80cb
font_03_sfnt_off0001cfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFBE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2