Malicious PDF — malware analysis report

Static analysis result for SHA-256 8267659e9ccd0862…

MALICIOUS

PDF

43.2 KB Created: 2020-08-05 17:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b9bd6325d26b03eafb86d07ebb701d6 SHA-1: 4c25a887dd1eb2f328510ecf0dc04880c968af95 SHA-256: 8267659e9ccd08627ab824c80e0a3ab7c6033ba2350d9895057dc8f911148767
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to various PDF files, masquerading as free downloads. The primary redirector URL, https://ttraff.cc/pify?keyword=geography+book+pdf+free+download+in+marathi, is flagged as malicious. This suggests a social engineering tactic to distribute further malicious content or lead users to potentially harmful websites.

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=geography+book+pdf+free+download+in+marathi
    • http://files.syncdental.net/uploads/1/3/0/7/130775862/jizorovivemuji.pdf
    • http://files.annabelleventer.com/uploads/1/3/0/9/130969097/5ae1373019892d.pdf
    • http://files.barambah-beekeepers.org/uploads/1/3/0/7/130775062/xukuzadefijizasalo.pdf
    • http://files.danielkulakouski.ca/uploads/1/3/1/4/131409677/lolufijopum.pdf
    • http://lujubexal.nosciastudios.com/uploads/1/3/2/7/132740805/potixoforega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/90243986094.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/81084041135.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/kazesironugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/52194888452.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/89188944042.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/9836170809.pdf
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/6874578482.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/story_of_an_hour.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/zisolofolizugawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/gitogebuweb.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/77540908911.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/zuxurojiwafiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/mozemiwadeweza.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_off000069e2.bin
5d5f91aa3550b68830b07c7ad1c5fb07964fdad959c0f1161639d5632eeb84e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 5704 bytes
font_01_sfnt_off00007d45.bin
2d2963e5a91b70e17ab8dfaff473e96284fc4a46124e7704cfb012cf89ac3454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D45 10080 bytes

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