Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8093513c5fb1eb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-16 20:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ee9ca92453637466329c1cd8a7e7d77 SHA-1: 2d8135063dca9dc59636eeb05af5086aacf8f2bb SHA-256: 7f8093513c5fb1eb495762ff4d6461296996460aaf0f131141be740f48482482
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. The primary malicious link redirects to 'ttraff.com', a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector.

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=avery+mailing+labels+word+template
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/jiberenowokubiridabor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8298/files/wovetebepiwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/83320837057.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/fonanutenunudotagolanawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/acupuncture_meridian_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/acs_gen_chem_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/jivapigepemowabuguxut.pdf
    • https://cdn.shopify.com/s/files/1/0430/3545/9738/files/51486543209.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/musubijupi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/64700859996.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/numerical_linear_algebra_trefethen_free.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_off00005daa.bin
5aa18be74911dc62f3f624abdb3857742f4e75e60e49e8ca808410060eb4a995
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAA 5664 bytes
font_01_sfnt_off000070e2.bin
3eee299f254d39fecf7565960ce16a4289748529d7c62a5bd042e0aa40971b39
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E2 10188 bytes