Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c881705dbdc9fd…

MALICIOUS

PDF

43.1 KB Created: 2020-09-17 00:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0013776e40afe1aa3f1bb445c4c66e3b SHA-1: e61afcade466a31b3edc631271fd3def19a0138d SHA-256: 68c881705dbdc9fda002743569272407505630715b4ca5602bb0b37072776c36
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one link identified as a known malicious redirector. The document body and heuristics suggest an advance-fee scam or callback phishing lure, aiming to trick the user into clicking the malicious link. The presence of multiple PDF links indicates a link farm strategy, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.me/wix?keyword=caliber+loan+modification+application
    • http://files.ianthompsonceramics.com/uploads/1/3/0/8/130874067/0c71723ae4953.pdf
    • http://files.guillome.nl/uploads/1/3/2/6/132696512/472ae.pdf
    • http://files.lcmadesign.com/uploads/1/3/1/4/131406744/gawenalisegak.pdf
    • http://bumoxop.greendrakeoutdoors.com/uploads/1/3/1/6/131637517/4227420.pdf
    • http://files.adrianeejones.com/uploads/1/3/1/6/131607075/zuxana.pdf
    • http://files.drmarysabal.com/uploads/1/3/1/3/131380558/1104339.pdf
    • http://files.dougsheat.com/uploads/1/3/0/9/130969576/8469915.pdf
    • http://files.johntherev.com/uploads/1/3/0/7/130738914/2442753.pdf
    • http://files.aimeehillmassageyoga.co.uk/uploads/1/3/0/7/130738701/001457ae44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://af78ddec-312f-4416-a866-d4a39ba5b71c.filesusr.com/ugd/0511f5_1a4b34f710cd412796e3eebadb8e905d.pdf?index=true
    • https://ab2c6e00-ef30-4f04-8a33-79f0a9e38e9e.filesusr.com/ugd/4c1554_7ef394a7b2544a2aa9157d2c63ed64f8.pdf?index=true
    • https://5807444f-183d-4c21-b57f-b741411f4489.filesusr.com/ugd/ab922d_9ec3c6586c8847c892092cbfd4f17232.pdf?index=true
    • https://ab4f4cc9-1652-49f9-8c4c-1c1020a48bb8.filesusr.com/ugd/229b11_5a603eec792144efbcfa4b253c5200c5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/fable_3_silver_keys.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/71131355500.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/1114597561.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_off00006b62.bin
a827abbdfe33ce90ff52a5f3d5387ab43d8883fe66f9991a96e3dba591d9d636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B62 5168 bytes
font_01_sfnt_off00007cd8.bin
4c875dd4c1473b234c30dda958ca95819475c3913e6753f486515cf1ebe5b6a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD8 10192 bytes

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