Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf37f412e7d640e6…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 06:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fdc3b7b279ed22c4e72408e91853b4c SHA-1: c7fe6ad5016f9f5dc364995daf9973795cdae254 SHA-256: cf37f412e7d640e60e39f12df535d0884618425b52dc1849a762c902b657b08e
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 of which are hosted on Shopify domains but appear to be part of a link farm designed to manipulate search engine results. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.cc'. This redirector is likely used to funnel victims to further malicious content. The document body itself contains obfuscated text and the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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.cc/pify?keyword=sc+st+atrocity+act+2020+pdf In PDF document text
    • http://files.j2theson.com/uploads/1/3/1/4/131453847/pomado-lebigizilifefi-jenovixuxa-joziku.pdfIn PDF document text
    • http://files.unnatinarang.com/uploads/1/3/1/0/131070212/3238589.pdfIn PDF document text
    • http://files.flyingelmer.com/uploads/1/3/1/1/131163960/mugotiv.pdfIn PDF document text
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdfIn PDF document text
    • http://files.exsanguinationsignet.com/uploads/1/3/2/7/132712483/bogululuvaxafogime.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/1/0433/0687/7080/files/lorabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/32907421049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/jerofilejajibulakemot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/calendario_2020_con_festivit_italiane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/list_of_pokemon_by_national_dex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31443612403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/august_2020_current_affairs_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/12319595456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/54123139093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/how_to_mod_a_ps3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/mcgraw_hill_4th_grade_math_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/munuxutumiwimisaluga.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_off00006cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5596 bytes
SHA-256: e585dcd96ca036eb0b25a26e3c2ec6338972eae7b774dd85cadf818dd1561bf1
font_01_sfnt_off00007ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 10068 bytes
SHA-256: 677ee87fafc74e3f17b046754d3402ee0242ee8a5a969b3fd4d8a612a923dbab