Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc1ffc0c6a6b4d9…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 06:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e073f071422e4535819d6140491ac75 SHA-1: 62f9b146b16fdd28b640e0838da53e46f0f5985e SHA-256: 6fc1ffc0c6a6b4d9e7de7245b6bf5cd449c1381dfd4b19855db7e40166bcf806
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm for SEO manipulation or phishing. The document body, though heavily obfuscated, contains text related to 'notification' and 'account termination', aligning with an advance-fee scam lure. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious verdict.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=apspdcl+notification+2020+pdf
    • http://files.adventurerunningco.com/uploads/1/3/0/7/130740212/f88527119359.pdf
    • http://files.flower-junction.com/uploads/1/3/1/4/131438570/xutuzukusutot.pdf
    • http://depomin.axiswarprize.com/uploads/1/3/1/8/131856372/4942653.pdf
    • http://gutolot.lakesidegrovers.com/uploads/1/3/1/6/131637257/gadopam-pelipopa.pdf
    • http://files.rachelannkaplan.com/uploads/1/3/2/6/132696598/1932804.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/64482694947.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/ziwatuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5371/files/17820657108.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/28587773321.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/enlightened_journey_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/36971205325.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/84760849955.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/7780055346.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/administrative_law_examples_and_explanations.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19490865332.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.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_off00006e2e.bin
c66ad45140269d94248195b6b53dec9e6da0d8ae1f0d3b698208ce538e4dace8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 5316 bytes
font_01_sfnt_off0000805a.bin
05ec3ea4ff39ece3e93f63329759cd2aedaa9eaaaed56f2251b70204e3083adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 10372 bytes

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