Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acf72e274609776…

MALICIOUS

PDF

38.4 KB Created: 2020-08-20 23:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fdc2bf4229160864a4068e789ba85cc SHA-1: dd5d6dffbabf05886390ae4a7bbd0375aa70cbaf SHA-256: 7acf72e274609776834fe1ba8298a0bd0388e8bd5add90e7a66b925ffc12caa0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a lure related to "escape room game answers level 2". The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=escape+room+game+answers+level+2
    • http://tufeku.staticcomputations.com/uploads/1/3/2/7/132712072/tadet_perusobudawu_gerikejeveza_zamivetanaron.pdf
    • http://files.sacredbalanceart.com/uploads/1/3/2/8/132814155/tatet_timifilof_vuwesi_zasafu.pdf
    • http://files.sebastopoltalentshow.com/uploads/1/3/1/3/131383743/6840799.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/ganawufufudikajadeledumit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/63695534589.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/wizokesifofixasevamafizuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/54834696233.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/kurabob.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/66511981014.pdf
    • https://cdn.shopify.com/s/files/1/0436/3144/4128/files/51884448249.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/zubedono.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/zisuwanoxibojupilope.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_off000058ea.bin
7640b8d88cffc3504763347170cbed4d3c115b413459e7d4d050d621724a735e
pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 5492 bytes
font_01_sfnt_off00006ba2.bin
d6b9b8ab22300b13af50dc28a216b620066d031e17287241b59789b6077a8125
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA2 9860 bytes