Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0f7cb2ded33732…

MALICIOUS

PDF

63.0 KB Created: 2020-08-15 06:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8706f465a64f9ed088b699014ed7b65b SHA-1: dfd0a632af6aa0476a6a707ecd3d456cd6022f7a SHA-256: 0f0f7cb2ded337326596692bf615adc251a8e4fb84e5826646a250183455628e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a solutions manual. This indicates a phishing or scam attempt. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious link. No scripts were extracted from this sample.

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.ru/pify?keyword=biocalculus+solutions+manual+pdf
    • http://files.carolinedancewest.com/uploads/1/3/0/8/130814232/sidirukuwakezezafe.pdf
    • http://files.alexkerrigan.com/uploads/1/3/0/9/130969089/c87db73db383d.pdf
    • http://files.cookingwithkelsey.com/uploads/1/3/2/7/132740701/3653935.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/9303106259.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/magi_the_kingdom_of_magic.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/78249666491.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/kugowajofalajazakevozazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/rasidujusijegiwetofuzor.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/fapatufejilutomuvimuwero.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6944/files/40436256920.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/wutatukonajuwigamux.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/xizamejupuregelixotufoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/nugamakujisalimexojorola.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/rockstar_social_club_down.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/xisew.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f18.bin
92f6060476c3462ab48952ed9d490fdb20f1830f96eeb38191a1e79c478fa654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F18 5256 bytes
font_01_sfnt_off0000b0df.bin
36fc03d2db9c1fc7c420bd5d5627fd5f6e7d075117d816560513c4ba8eff51b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DF 12080 bytes
font_02_sfnt_off0000d987.bin
04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 16112 bytes

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