Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6987cd1d8555009…

MALICIOUS

PDF

44.3 KB Created: 2020-08-10 06:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f31c802cc23d117494cf7072faf9e7 SHA-1: 8a1f025cb07f7e4d790ba12d2bd0b773ccb3b99c SHA-256: a6987cd1d855500952bed0ebbdcc0bcf5f3315aad2a154108da62eb068957af5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though corrupted, contains the target URL and appears to be a lure related to admiralty charts. The primary attack vector is likely social engineering via a deceptive link within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=chart+5011+symbols+and+abbreviations+used+on+admiralty+charts+pdf
    • http://files.flyzephyr.com/uploads/1/3/1/3/131398591/tadupiletokeg.pdf
    • http://files.bradseng12.com/uploads/1/3/0/8/130874416/befadokagivavud_waxov_tobuzamal_vopuw.pdf
    • http://files.lwvchampaigncounty.org/uploads/1/3/2/3/132302768/5760672.pdf
    • http://pobube.jalbrightclassroom.com/uploads/1/3/1/4/131453194/tezajedegaxika-zixutalid.pdf
    • http://ruvasa.thesweetfarm.com/uploads/1/3/1/1/131164250/5410656.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/how_to_install_a_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/giverovuvisukuxozufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/fowuxok.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/cg_police_model_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/what_does_ily_mean_in_text.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/69321505506.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/2014_chrysler_town_and_country_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/western_blot_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/nepagupodijedebeto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/importance_of_globalization.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/82676109570.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/children_s_bedtime_stories_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/sagife.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ad.bin
8d26a9590236641af30c342f0a5b41077bc1ab243b684d98347b04cb82f66b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AD 5920 bytes
font_01_sfnt_off000077b6.bin
2738ed6c6d57c94be8deab320967f0fd630201b3a7ae5bd707e09031675e679b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B6 14048 bytes

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