Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff157145c60ba14…

MALICIOUS

PDF

53.0 KB Created: 2020-08-20 03:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9303336a13b86a90aee057d656096b03 SHA-1: 1b140dc8ddfd3063f829d94d4c41461ea8dcb272 SHA-256: cff157145c60ba1400277d22edffa7586ce4bc7765ab297c21e86b23f0a4c08e
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to shopify.com domains, which is indicative of a link farm. One of the primary links directs to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the target URL and references to 'wkhtmltopdf', suggesting it was generated by a tool for creating PDFs, likely to host the malicious links.

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.
  • 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.
  • 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=xslt+uppercase+template In PDF document text
    • http://files.eastandwestfinearts.com/uploads/1/3/1/3/131384771/4971e075c5518.pdfIn PDF document text
    • http://tolok.beatfurrer.com/uploads/1/3/1/3/131379578/7c18c73b923e7.pdfIn PDF document text
    • http://pijin.brijcommunity.org/uploads/1/3/2/3/132303354/mixawav_lunikufazujakoz_nobikok_segipegaxesol.pdfIn PDF document text
    • http://menuja.underthesunsolar.net/uploads/1/3/0/7/130740066/79ed410da3d3.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/1/0437/4275/7029/files/35531289419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/lagu_hanya_rindu_lirik_metrolagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/57504858202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/2839340190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7154/8066/files/67137832244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/surulasibutemuvapezulit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5907/files/99168181324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5586/4215/files/80965322515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/uc_browser_java_app_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5771/7143/files/59037414348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0899/9072/files/87963447479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6549/2127/files/69028247176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/vegogujud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2467/0105/files/lixuwaronunilosalirelo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC0 5056 bytes
SHA-256: 99f671ddf2bcbbda07b074c390df485076f87164761a5e801ef96682434933a0
font_01_sfnt_off00007cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD4 16308 bytes
SHA-256: 2e8f510b8682bfc87f7bcb91726e8b9856b3c4530b21e4f98ccd9129855622f3
font_02_sfnt_off0000af33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF33 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501