Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e36bbc4d35dd495…

MALICIOUS

PDF

41.7 KB Created: 2020-11-04 03:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 46fa721dbf08755f685eb595600a2852 SHA-1: 47c32c1ea0f540d8f177e14712eeb2cb3edea405 SHA-256: 4e36bbc4d35dd4955d00011332a8e89c7428047e414dcd1085d440e3b8e6ee58
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the URL 'https://gettraff.ru/aws?keyword=download+shareit+pc+apk', suggesting a lure to download software. The presence of a large number of external PDF links hosted on disposable domains indicates a link farm designed to attract traffic, likely for malicious purposes such as distributing malware or engaging in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/aws?keyword=download+shareit+pc+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f8d4c7dbeb50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f878a561ed83.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/najozusof.pdfIn PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/2295905.pdfIn PDF document text
    • https://niviraxaxupo.weebly.com/uploads/1/3/4/4/134469592/93a24f4f97f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f91810e491d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f87598b3b0cc.pdfIn PDF document text
    • https://zozelezike.weebly.com/uploads/1/3/4/4/134434207/xatipavifafaj-nigegili-podixovoz.pdfIn PDF document text
    • https://genifefesabido.weebly.com/uploads/1/3/3/9/133999330/6150412.pdfIn PDF document text
    • https://vakigosem.weebly.com/uploads/1/3/4/4/134480352/bupijawuwamuvose.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/rirewotubazejibigi.pdfIn PDF document text
    • https://netopanuneju.weebly.com/uploads/1/3/4/4/134493403/muwamawafibus_ridovadim_baxelarina.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/novexefodepomuro.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/ea112455b349e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/padoragog/your_turn_practice_book_grade_5_answers.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CF 5316 bytes
SHA-256: 48b985c44af558fbcb3857461df7ab0bafe77428868d6309b3e6e0f7d62ecefd
font_01_sfnt_off000073f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 12020 bytes
SHA-256: c17378002c1b1b9e4d55608a2301ed164e8810384ec151eabb09e79e9aa2e2f1

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