Malicious PDF — malware analysis report

Static analysis result for SHA-256 06022cb7d1127ce4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-20 22:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cf312992d92dd619d8d4f091daefd4f SHA-1: 793184441a9d7c16bf4063ac4dad7800f4724586 SHA-256: 06022cb7d1127ce494f2e89dce0575b4e9ec808eb430532a0df5093ee0c576ba
174 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 suspicious domains and are flagged as part of a link farm. One URL, 'https://ttraff.cc/pify?keyword=jaiib+accounting+and+finance+notes+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'accounting and finance notes pdf' and the malicious URL, suggesting a lure to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=jaiib+accounting+and+finance+notes+pdf
    • http://zabolu.wilmoi.com/uploads/1/3/1/1/131164250/6272996.pdf
    • http://boxotogi.chezchase.com/uploads/1/3/1/4/131437208/2694610.pdf
    • http://kawezetu.mylarkapparel.com/uploads/1/3/2/8/132814930/0c7b5e65b.pdf
    • http://xoduwe.gilliardandcompany.org/uploads/1/3/2/8/132815176/rones.pdf
    • http://files.bvl.ca/uploads/1/3/1/8/131856476/2991430.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/14502706725.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/90932981081.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4367/files/73343383697.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/58882916539.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/91273972485.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/lipozudosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4340/files/53194681881.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/java_1._6_0.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/lepelijisonum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/xasebuxibubowuruxef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/vivevusudetusetutiruvilon.pdf
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/mojo_village_las_vegas.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_off00006514.bin
6ba92157714a922606d6309a83e11334c757e1b673f6d4dcfc5d44b176090392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 5324 bytes
font_01_sfnt_off00007739.bin
2ca59ffea80c97b2f1d0f1d69d6dec5905c101a0da4ea6f6a8cab40925680312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7739 11000 bytes

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