Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cf2c53c84232b0…

MALICIOUS

PDF

40.0 KB Created: 2020-08-11 18:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a83d3ef9de9e215e664dab0aca1b865 SHA-1: 6ae16cf4fe3dd81cd35ed84b20bf75c1129cecb0 SHA-256: 18cf2c53c84232b0604a3b81b976948536877d25a47be25c3d70ca88f0fc164c
202 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, specifically for containing links to known malicious redirector infrastructure and a large number of external PDF links, suggesting an SEO link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=bsc+agriculture+1st+semester+syllabus+pdf' is a primary indicator of this malicious activity.

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/pify?keyword=bsc+agriculture+1st+semester+syllabus+pdf In PDF document text
    • http://files.constitutionpartyms.com/uploads/1/3/2/3/132302963/kuzazetegenedew.pdfIn PDF document text
    • http://files.thedigitaldogpound.com/uploads/1/3/1/3/131398236/0097539144370.pdfIn PDF document text
    • http://files.cancercars.net/uploads/1/3/1/3/131379439/fujefum-vajipeziwubex-favovuvabejed-sixuritigoko.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/1/0428/6201/8716/files/42065111087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/93722568161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9613/6098/files/you_spin_my_head_right_round_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/quicksort_median_of_three.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/61392433591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/3726659285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/48844460884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/structure_of_atoms_and_molecules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/89044283291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/rudesajilokewutudobad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/subnautica_charge_batteries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/sokoxasuvewini.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 5816 bytes
SHA-256: e992dac9c7c777bc1945594c3d38cbbd1afc3f31af976872fff245b0989b2a6c
font_01_sfnt_off00007173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7173 9936 bytes
SHA-256: 7f60bc4add1a69c462132eaea305481b3ac8c8f3c57a6d0aa0557003b6e9fd60

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