Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dc8c5f46e26298…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 20:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8384ffab0aa0ab65935c8ba2bd6469e2 SHA-1: 701b16c64142f6294bc3ac30a9af728c004b9369 SHA-256: 40dc8c5f46e262982b8ed13913b5a687bec12eb632a4534bf7401ec37139e1e6
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, with one heuristic specifically identifying it as a 'PDF_MALICIOUS_REDIRECTOR_LINK' pointing to 'https://ttraff.cc/pify?keyword=probability+by+pitman+pdf'. Another heuristic flags it as a 'PDF_SEO_LINK_FARM', indicating a mass of external links. The primary purpose appears to be redirecting users to potentially malicious content or for SEO manipulation, rather than delivering a direct payload within the PDF itself.

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=probability+by+pitman+pdf In PDF document text
    • http://files.silverswordgoldenretrievers.com/uploads/1/3/2/6/132681891/fuwiwu_zutadapibitu_sisulid.pdfIn PDF document text
    • http://files.celebraterecoverycb.com/uploads/1/3/0/7/130775143/xuzasobafavad-zutovatovowatal.pdfIn PDF document text
    • http://files.bremertonfoodline.org/uploads/1/3/0/8/130874046/2227031.pdfIn PDF document text
    • http://files.circusgirl.co.uk/uploads/1/3/1/8/131856134/pijosa.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/1/0427/8406/3654/files/tenuzepesudelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0409/0792/files/zazanowelalasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/72715282765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/12728806420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/narwhale_io_hacks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/61662318077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/bevenosupirivasojiliwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/bidalirufufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/ladoviwegopobenewelarupel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/pizoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/pavibinitebowifebol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/14381714124.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 7

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_off00005e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 5252 bytes
SHA-256: 551f4ab4898f1e66685da61daf42826743e95790d0c0d32f168b00bd35a9bad8
font_01_sfnt_off00007009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7009 13792 bytes
SHA-256: d95aee2c100963dd5ca23ccbf8cf6ce2975a2e9c00d3de338c8688527614f029

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