Malicious PDF — malware analysis report

Static analysis result for SHA-256 72876f6f67626305…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 00:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0edf753613745f61391e1ee0de2981bc SHA-1: 38f4f70850617a88054a5b856068e2f807f6e1af SHA-256: 72876f6f676263056baf9d817d50415957baaaf42420a11bf1c4aac572bff91f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=marketing+research+pdf+notes', suggesting a lure to external content. The presence of numerous other links, as noted by PDF_SEO_LINK_FARM, further indicates an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=marketing+research+pdf+notes
    • http://liwawit.wildfireball.org/uploads/1/3/0/9/130969358/dujopow-bulizi-runowogobuva-mepiwezojid.pdf
    • http://velunozan.lmcphoto.space/uploads/1/3/0/8/130874284/lowegitilo.pdf
    • http://files.sydneypaintinggroup.com.au/uploads/1/3/1/4/131437702/5cb4ba42.pdf
    • http://files.stemonline.org/uploads/1/3/1/1/131164081/gidobenumeji_zavomelazezize_gazesudif_pimimak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/76095112294.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/construction_cost_estimation.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/guvidat.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/8754257958.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/penfed_credit_union_routing_number.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/midupog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/adventurer_s_vault.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/739444036.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/kefajevokerigokeselote.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7991/files/gw2_armorsmith_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/mujafefip.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_off00007896.bin
82660740adac44de4f91336f26c1188f08162f62bffb7b38d069c0fb96b45ba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7896 5456 bytes
font_01_sfnt_off00008b25.bin
b3d64eb698ddfa4bde25e72209ae16d197dfb56b5ddc43fc6bf25fa2d6bf6b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B25 10164 bytes

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