Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb70e48a63fafe1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 19:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42a1220a0404170161e5a68386923ac6 SHA-1: d82a68ad99fcf72cb9daa520828b6ffdabaf151c SHA-256: 0fb70e48a63fafe169df40a5608a9186ff3656295e3ce2fb51d3832ba2b84152
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains similar URLs, reinforcing the malicious intent. The presence of a password archive lure heuristic suggests this PDF might be a precursor to delivering a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=abecedario+en+ingles+pronunciacion+para+imprimir+pdf
    • http://files.drklaracarson.com/uploads/1/3/1/3/131398432/gumaxi.pdf
    • http://files.tiftcountyshowchoirs.com/uploads/1/3/0/8/130813696/2020819.pdf
    • http://zifopan.shoanlo.net/uploads/1/3/0/9/130969204/fc7b2544acee940.pdf
    • http://gojedakav.missrodeokansas.org/uploads/1/3/0/9/130969054/rodamaze_ludev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/punctuality_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/26514558599.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/galunatobotebupimudupajok.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/16747898132.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/130461448.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/93769751259.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/58481618604.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/bumusosesojubeloga.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/malojupijota.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/74271580834.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/roblox_camera_manipulation.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_off000068ba.bin
ca95634b8560847e5c9903c828fa095b0dad9d98798fb8ff9823647f5a2c06cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BA 5604 bytes
font_01_sfnt_off00007ba4.bin
28855110757277ae3bf7d9b55d3d87e0dea2246bf43d26c1eafced824c9416a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA4 12540 bytes

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