Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d022334bc6292c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 23:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 397c2156e42dd424fff85461659e9376 SHA-1: 35567f321db240d7692df2290d5c0e2bd0ccdc4b SHA-256: 75d022334bc6292c6f2cc342c062e9e2885d901e0d245656555b643f6bb1e780
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.cc' domain. The document body, though heavily obfuscated, contains references to the same malicious URL and numerous other PDF links hosted on Shopify, suggesting a link-farming or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=o+futuro+da+humanidade+augusto+cury+pdf
    • http://files.hooksnsinkers.com/uploads/1/3/0/7/130775115/4e3a01d84d85a.pdf
    • http://files.ridgecrestelementarypta.org/uploads/1/3/1/4/131453698/8889495.pdf
    • http://files.geraldbuckfield.com/uploads/1/3/1/4/131452949/tosowozotufixowowax.pdf
    • http://files.kudubijou.com/uploads/1/3/2/8/132815178/f6f7b348d605bfb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/waxemefijilibajepuzuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/mega_punch_or_mega_kick.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/pukoso.pdf
    • https://cdn.shopify.com/s/files/1/0449/1404/9191/files/psychiatric_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/vukagajunizitewom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/butudodabidariruwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/51416023147.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/lovikagupoferepuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/sonic_the_hedgehog_rom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/bharat_ko_jano_2020_book_in_english_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f6.bin
bc998a66d1ccd867092551f9d050715ef8a18f57acd93cd439d456ffedd4f5dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F6 5664 bytes
font_01_sfnt_off00007b2c.bin
f2757a10b0bb14bbf16657fd59ae41f8b17a4441003e1e184c9ea15103d593fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2C 12692 bytes