Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de4d815ef8a0808…

MALICIOUS

PDF

34.2 KB Created: 2020-08-21 22:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc4a8a374cd3e7d746259ef90049ec7b SHA-1: 5689556a5d47dd29bc3f69805a3687d0729c824b SHA-256: 6de4d815ef8a080828d78e01d521ad06e1be8e8c4254a09f6b2e7c43062f10ce
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.cc, which is likely used to obscure the final destination of the malicious payload. The document also hosts a large number of external PDF links, many of which point to potentially malicious or suspicious domains. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

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=on+my+way+song++pubg
    • http://bukuruw.desotoyou.com/uploads/1/3/2/6/132681337/ca21c6.pdf
    • http://zifozawup.seanotoledo.net/uploads/1/3/1/3/131384401/ad7beb24f5d.pdf
    • http://laxek.ludloweboyssoccer.com/uploads/1/3/0/8/130814328/3872932.pdf
    • http://files.womanspiritjourney.com/uploads/1/3/2/6/132682471/gilowajogavogije.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/lafotevojasofisupavazopax.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/2705690084.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/mefawarelabatig.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/financial_enterprise_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/43642166149.pdf
    • https://cdn.shopify.com/s/files/1/0435/1636/2904/files/68526211587.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/discrete_mathematics_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/fowara.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/holistic_rubric.pdf
    • https://cdn.shopify.com/s/files/1/0433/8892/8150/files/97727834106.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_off00004841.bin
a4c48a07817ce452d61deb574c0e129bb778572ef1fb3cf9072d77464597238f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4841 5372 bytes
font_01_sfnt_off00005a8a.bin
6050a57a902da7f44ce788962ad23e9720d11193081729c5335a1176ee793b4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8A 9888 bytes