Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c375860d79791e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-13 01:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3507a6aa6ca33e9835d6249feacfda48 SHA-1: 9a86a3612edcfee7a7107f32748da2d0a30537c1 SHA-256: 38c375860d79791e3ce964a6dfc65eaaa6fe220ed9249d492ffc32c7385b679c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.cc. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the intent is to trick the user into clicking it. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=formula%20to%20calculate%20compound%20interest%20in%20excel%20worksheet In PDF document text
    • http://files.chapel-associates.co.uk/uploads/1/3/1/3/131383323/xomutivotabafekoda.pdfIn PDF document text
    • http://files.mentionables.org/uploads/1/3/2/6/132681517/6ec62f398fd.pdfIn PDF document text
    • http://giderof.royglobalized.org/uploads/1/3/1/3/131398560/zikafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4581/7253/files/54689213900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/basic_english_grammar_book_2_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/2008_ford_fusion_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9772/2785/files/tilewopebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/90386721464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/albert_camus_the_stranger_french.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9493/2640/files/98113412095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/12601947047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/mad_crazy_love_line_dance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/93463880279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/waterfall_model_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8962/9079/files/download_novel_arifureta_shokugyou_de_sekai_saikyou_bahasa_indonesia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 5492 bytes
SHA-256: 51175395fec367358dd60ece050cf1cb97ffcb6a989d17b678f7d00df56f3ef3
font_01_sfnt_off00007348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 10624 bytes
SHA-256: 79053e55dcfa98f440159f315e1912ba54946b6cb19faf620c0484899521d899