Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f601a9a127fd25a…

MALICIOUS

PDF

40.5 KB Created: 2020-07-29 07:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97c3dd6f233c8ff18f6fad3249e200a7 SHA-1: c8ec1ea9fa2803585840b8ed9d6987f262408129 SHA-256: 0f601a9a127fd25afeb1639b4e5ff088eb414ef4b56fa091faa5c90b6a2ac7a8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=050+aluminum+sheet+4x8', is flagged as a redirector to malicious infrastructure. While no scripts were extracted, the sheer volume of links and the identified redirector strongly suggest an intent to lead users to malicious sites, likely for phishing or malware distribution.

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.cc/pify?keyword=050+aluminum+sheet+4x8
    • http://files.prairiewindslife.com/uploads/1/3/0/7/130775229/kizegoseva.pdf
    • http://files.houseofdiamondsart.com/uploads/1/3/0/7/130775373/nowumanujaw_remeg_vodoginifoguf.pdf
    • http://files.1776totyranny.com/uploads/1/3/1/0/131069886/nedobaxifigogo.pdf
    • http://files.mrc-k9.com/uploads/1/3/1/3/131398515/gugivigetavam.pdf
    • http://files.indiarosekushner.com/uploads/1/3/1/3/131380741/2b9dae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/wapofedoferifizegobame.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5886/files/92485188241.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/29308358731.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/lupugifagijiwavekavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/filimodorisametozodunas.pdf
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/lizej.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/bolimizigasajime.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/96699487219.pdf
    • https://cdn.shopify.com/s/files/1/0437/9249/8850/files/jojapaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/tawowotajuwuzipixuxasuval.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/fijakafivalezagotodadudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4411/files/56491237681.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/novafezumenolavapufijap.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_off00005bae.bin
c65daeec4e4cd876f4dd4138b584947ee920afbe5627761c2f6261ae22971e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAE 5120 bytes
font_01_sfnt_off00006ce8.bin
3efadf9d6f4d567dbe6ae12194fc2e7c6ebc7290223299e6ed159e4674ffce93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE8 12416 bytes

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