Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebbf36842fea399…

MALICIOUS

PDF

39.9 KB Created: 2020-08-24 08:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8e7411a88108cb4c83de7389273faf16 SHA-1: f0391f6debf67b2c30ad9959d8dafe6740b1c00e SHA-256: 1ebbf36842fea3998963eeaaf8cf0cb48276c63da3ade2c153efca3de72c6f2c
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=ansys+mechanical+apdl+user+guide+pdf In PDF document text
    • http://tikav.friendsofparkswf.com/uploads/1/3/0/7/130738721/tinuperevewomevoz.pdfIn PDF document text
    • http://duxisu.yourtattoostory.com/uploads/1/3/1/4/131408899/2c212fe45605f3.pdfIn PDF document text
    • http://files.be-psychology.com.au/uploads/1/3/1/4/131483201/rewuri.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/1/0440/2439/7989/files/5904978971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/bapunobiruluxoxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/gupasomowasaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/48749319115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/44337207666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/chauvet_high_performance_fog_fluid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/astragalus_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/ad_d_players_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/champions_league_match_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/accumulation_of_capital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/3d_consortium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/1709284318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/1194560408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/attack_roll_5e.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_off00005d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D21 5660 bytes
SHA-256: 1965d798e3458b1c3c0c809055e308375219618adbee3c57e8891ec65a553ea7
font_01_sfnt_off00007035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7035 9988 bytes
SHA-256: c481fc1ef1316fdeb60d616281b2fd0c36736d48c5f1f52ed6c3a72f970d912c

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