Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb84fcab0a2cad1…

MALICIOUS

PDF

39.0 KB Created: 2020-08-12 18:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3622b0291eecb0e4520a2ac99a5a271d SHA-1: aa988b37293417b61f5285feb01dc14b66b9e5d3 SHA-256: 8eb84fcab0a2cad13a8234154e7747f4c6153bd10290c45a4aa639be32d766e2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The ML classifier also flagged this PDF with high confidence. The presence of numerous external links suggests a link farm or SEO poisoning tactic to lure users to malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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/wb?keyword=comparative%20adjective%20and%20adverb%20pdf
    • http://lelex.claudiaosborn.com/uploads/1/3/0/7/130775380/biborakepu.pdf
    • http://fofanuxe.starstatusboxingpa.com/uploads/1/3/0/7/130775727/5919690.pdf
    • http://duduju.thehistorydig.org/uploads/1/3/2/6/132681947/020cc8ad570.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/mansions_of_madness_2nd_edition_rules_reference.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/deriz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/80168561638.pdf
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/92931712447.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/falakedore.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9717/files/printable_phonetic_alphabet_chart.pdf
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/10626244277.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/susanurekugumezemanajo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/ririzexidodeburexopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/pasaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/roomba_690_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/5276/7131/files/rixewadilikul.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/kenmore_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/ibc_container_dimensions.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad9.bin
3700f77e81ccf7ecfe15a668c95247bb1f1723765186151b925de282a5d39250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD9 5272 bytes
font_01_sfnt_off00006cb5.bin
5ef3e2f9c00655a22cb938be1a4b2d217d7325540660e9a50b68de399be3a0b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 10120 bytes

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