Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f30b9cd5c5ed0e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-26 10:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a01312448ae6d00c84763ba2ef284694 SHA-1: fe0893ac88ea0f51c5fec9bc84e374f9bc9165d1 SHA-256: e5f30b9cd5c5ed0ed65500072b8d4585463561cdbd5d32daaa195f1d6d1fbced
150 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=the+scarlet+ibis+unit+activity+packet+answers'. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of a malicious redirector and a link farm strongly indicates a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=the+scarlet+ibis+unit+activity+packet+answers
    • http://sisiresu.cyfairironmaidenslacrosse.org/uploads/1/3/0/8/130814328/vudogadiva.pdf
    • http://files.3rdpointproductions.com/uploads/1/3/0/7/130739987/relikewigeda-visos-revafitosur-paxole.pdf
    • http://files.polishedspurtackco.com/uploads/1/3/2/6/132695530/kamoxufifovij.pdf
    • http://files.inlandmarineinc.com/uploads/1/3/0/8/130874238/gadumubibabuxopi.pdf
    • http://files.bigflatspreschool.com/uploads/1/3/2/6/132695828/tawawebezoji.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/cardinality_of_sets.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/texuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/waxovelalotalut.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/16241286857.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/68962038752.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/wufuzokobanel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/anita_blake_micah.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/55483556590.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/98678139747.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/65334239240.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/gemusiwosawipideta.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/annuity_due_problems.pdf
    • https://cdn.shopify.com/s/files/1/0436/3767/0041/files/91341799200.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6054/files/36994970404.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/definicion_de_metales_alcalinos.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_off0000704d.bin
c8e8a29cf8e6856d51d4ae157980b7bfbc9cfb778f2113430d55d6cb0a625812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 5428 bytes
font_01_sfnt_off000082cd.bin
597437668613169c502e88d14d0ad72ee11c7c4646af6196c7fe6b654a58d577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 10088 bytes

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