Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd3af12eb90f3bb…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 14:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c2a085aea83f241f12dca6b1bd7a29 SHA-1: c38959e79a6d973f17d11a93c0340c313c53fce3 SHA-256: 5cd3af12eb90f3bb90f8523fcfeef87946a8fbfcdee94dfe14c01497320d9e98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on platforms like Shopify. One URL, 'https://ttraff.cc/pify?keyword=time+worksheets+grade+4+word+problems', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially to distribute malicious content or improve search rankings for unrelated material.

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=time+worksheets+grade+4+word+problems
    • http://files.expiredposters.com/uploads/1/3/2/6/132682745/2688766.pdf
    • http://files.joinerystudio.com/uploads/1/3/1/0/131069812/nokuzesawo.pdf
    • http://files.necelderscouncil.org/uploads/1/3/1/3/131383657/cc5bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/english_to_bangla_vocabulary_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/27437325003.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/ejercicios_resueltos_de_capacitores_mixtos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/49167944743.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/12451692107.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/wogotimivopejum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/defozopopovubemape.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/nebonipomefazulimoxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/delifemozal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/51884018290.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/56196573433.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/komezarizifaxixokeridema.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/vomog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/lpu_assignment_front_page.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_off000061b0.bin
568d97bdfa7b0b4bfec4af59125a2cb9d5dc1fc03bc2129ad985d8ce0bd36ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 5704 bytes
font_01_sfnt_off0000750e.bin
93f0c5b6203c17962083ca87c469d10c52bc8a912961bacbc5af92c967d00ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 10116 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.