Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa109d74b356366c…

MALICIOUS

PDF

45.0 KB Created: 2020-09-25 16:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3f25c1bea1b1aa1f1b12c68bd93fa47e SHA-1: 22b511dedb3b74275ffc0011d70cbd6606cf12fb SHA-256: aa109d74b356366cd82047a3a35a8172da5569861e870c538b7d5770d97d1f09
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.ru/pify?keyword=william+lamontagne+jr+appearances In PDF document text
    • http://tegopem.grangerlandrfd.com/uploads/1/3/2/7/132741100/43a2b5bff.pdfIn PDF document text
    • http://files.matthewdensley.net/uploads/1/3/1/4/131453267/1431113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8278/4673/files/english_bible_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/fusatog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/jolewizude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/jomituwozeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6372/4200/files/29905510384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/obj_to_mdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/foreseeresults_com_sprouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/c_programming_language_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1239/4649/files/46706051622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/nosolekigufizuvizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/94501145966.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 5128 bytes
SHA-256: 83f447cbfddcb3e7c7f3aa9ec18abadbce97fa7d38159ba095a656d777c2e823
font_01_sfnt_off00007608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 10192 bytes
SHA-256: 6c39a02471edcb1b22c38fc38b6e94936727b266768cbfcf3d4e2105e6e36535
font_02_sfnt_off000098f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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