Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4040939d183cc8a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-06 05:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b6713df3564943934ed42e3410f9f65 SHA-1: 72c35f79ab821f361457d571ac68e7eb2a7b6a5f SHA-256: d4040939d183cc8a7dbbbf27e4ce8838137f6636e7e1dbb4891d42ed7c3ce0fd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded URLs also point to a link farm designed to appear as a free online PDF converter. This suggests the primary goal is to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=free+online+pdf+to+word+converter+zamzar
    • http://files.ladymaeimpressions.com/uploads/1/3/1/3/131379434/ba398.pdf
    • http://karedupo.broadwaysilkens.com/uploads/1/3/0/8/130874633/pebepakokemuvu_voviwum_zajus.pdf
    • http://finofit.mrhealthcoach.com/uploads/1/3/0/9/130969356/5743852.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/90899469187.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/gakogik.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/2012_camaro_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/48687821787.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/90800686211.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2168/files/synonyms_and_antonyms_list_with_bangla_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/63889788332.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/getobifur.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/5882288448.pdf
    • https://cdn.shopify.com/s/files/1/0433/5661/8917/files/base64_string_to_using_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/6299697705.pdf
    • https://cdn.shopify.com/s/files/1/0435/3920/2207/files/blackboard_palm_beach_state.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_off000060b8.bin
a70e673f26df91da7ef4bc0599493f14f231d5c8f8f60df9ebf34d9e9da0f2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 5280 bytes
font_01_sfnt_off000072bd.bin
e3a6d5e682feb4640a835de4aa52a9dbbeb0f4d03a5a214721b3a18e5c2977b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 9964 bytes

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