Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b8e69513e8e41b…

MALICIOUS

PDF

46.8 KB Created: 2020-08-10 06:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cf001930f0b2fa56f58d6a0fc8b4ab8 SHA-1: a8225b0b2c1f9ecccf78b431f06acf5d0cb984e0 SHA-256: 04b8e69513e8e41b405db03219543c4bc3f01a2ae7f482d2b887c414194c10a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm designed to manipulate search engine results or distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=antibiotics+list+a+z+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a phishing or scam attempt.

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.com/pify?keyword=antibiotics+list+a+z+pdf
    • http://files.upwardfacinglife.com/uploads/1/3/1/4/131436971/velolerulamur_baxafijirun.pdf
    • http://kepipu.madewithlovemonika.com/uploads/1/3/2/7/132712615/47099b4d.pdf
    • http://files.inhaleexhalerun.com/uploads/1/3/0/8/130873787/lilagozaluluwadi.pdf
    • http://files.asq-ce.org/uploads/1/3/2/7/132710797/8738200.pdf
    • http://files.homeherbals.com/uploads/1/3/2/7/132740905/8319162.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/kingdom_hearts_358_2_days_rom.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7909/files/zupij.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/7339243127.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/koxilowazisote.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/47866848844.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/jutobevugofoxuxopow.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/nunibiwalosafede.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/45776170798.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/71755522445.pdf
    • https://cdn.shopify.com/s/files/1/0437/4999/8743/files/fivudurozolebelonup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/14916643479.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_off000079fb.bin
63be892771e6925dbbf18c3024b9c4bcf48b73a1bcae0410ed5000f43f11bf6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FB 5232 bytes
font_01_sfnt_off00008be6.bin
a6faa344d6e70134ab3391099252bd062a6854c2b4519df9d9771bd3d8479829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE6 10048 bytes

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