Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3031091bb92c9e…

MALICIOUS

PDF

44.0 KB Created: 2020-08-20 19:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9663021a2e6da37b707442dc28a953e0 SHA-1: 2501a4f83ea3760f23fa0f6fecc1a44a1f1b6e87 SHA-256: ca3031091bb92c9e0cb12a4b7d6a0f71ad3addd3e92696b3b7f2dcc956dd3949
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.cc/pify?keyword=arduino+uno+usb+driver+xp In PDF document text
    • http://files.altitudeluxurytravel.com/uploads/1/3/1/3/131383771/1303870.pdfIn PDF document text
    • http://files.nwgyfl.club/uploads/1/3/0/8/130873728/5730455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/circular_saw_blades_for_cutting_sheet_metal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/fogeremanuzumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/84968513394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/treatment_of_acute_myocardial_infarction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/98052704378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/fomilubudadomurorofutejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/sulekesafazafit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7090/5756/files/trimple_of_doom.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_off00006bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 4968 bytes
SHA-256: 4dbf1886629724484adc036f51849a82c6473ac0040336becc6fff9b3497a8e1
font_01_sfnt_off00007cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB1 12256 bytes
SHA-256: 4c39782d879378b1914367832f18b5f9c3197dc7f7ebd8a854502118eefdc2f0