Malicious PDF — malware analysis report

Static analysis result for SHA-256 1989b015f61929d0…

MALICIOUS

PDF

34.2 KB Created: 2020-09-20 15:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c99185de0bf1a7dbf1fa57329258ef06 SHA-1: ef26bafc7adedb7d9c16882b53438044c69b5515 SHA-256: 1989b015f61929d090fe061f7cc9ef0a5ec2820c1a8ba0720a0a6ff04aa60467
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The embedded URL https://ttraff.me/wix?keyword=hansen+%2526+adkins+auto+transport+jobs is the primary indicator of this malicious redirection. The PDF also contains a large number of external links, flagged by PDF_SEO_LINK_FARM, suggesting a link farm or SEO poisoning attempt, with one such link pointing to a Shopify domain. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=hansen+%2526+adkins+auto+transport+jobs
    • http://wusedige.sharonrobotics.org/uploads/1/3/0/8/130813117/848574b08fcb.pdf
    • http://files.hugreece.com/uploads/1/3/0/7/130775528/zegogumufit-warobeguzuxuliz-tofadamaduked-wofajamiwu.pdf
    • http://files.indygreencongregations.org/uploads/1/3/1/3/131379971/3832509.pdf
    • http://vuvur.missingpersonsrv.com/uploads/1/3/2/3/132303354/598715.pdf
    • http://files.orientalvenus.com/uploads/1/3/0/7/130739210/7385294.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/7822/1729/files/top_paid_android_apps_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/bozijenomujumufinazumi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/green_glass_room_riddle_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/70980754549.pdf
    • https://a1bcf5d0-79dc-4a23-9081-0fc50e1bb172.filesusr.com/ugd/5de1df_590a02f3e37747258cfed597bd5951bd.pdf?index=true
    • https://66d4f5be-eaaf-47a3-8ac0-ebe1f7b5b10f.filesusr.com/ugd/b2ba6b_f9f95fbf09ef4e6785d1ee2bd2796c71.pdf?index=true
    • https://c835ee1e-1829-438d-ab7c-d6bc6c4e14f9.filesusr.com/ugd/d4c4cf_5806a04d7fb54ecf8668ba88ccd3b796.pdf?index=true
    • https://c79e3de3-2ed2-4120-a384-cfe9008a4e36.filesusr.com/ugd/6c313a_116e756a241f439791c45a41c81d195c.pdf?index=true
    • https://24cbfadb-1610-4e87-98a5-419c00eabb09.filesusr.com/ugd/35ddae_72b71b860a5b4fc9b449d71ed56ed73e.pdf?index=true
    • https://03f3a206-3580-425e-9393-d823d21e89d0.filesusr.com/ugd/98857b_bfb5be99a1f34518b11c40049942ab0c.pdf?index=true
    • https://fb269893-00bc-4aab-94b5-f8cf32c22bba.filesusr.com/ugd/e9cba9_9e9da759f73f42c4b001530e8fdc4e6c.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b2a.bin
b86e8cf1acd29fa3c05e6a1d718c45fc346e516f70ec6f8a7dcef9d3c749b173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2A 4504 bytes
font_01_sfnt_off00005a7f.bin
375ecd77aa0915b24432edf9f4f883c305a9884b8e6ff92eafda2421dec9b18f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7F 9960 bytes

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