Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afed5bf442be068…

MALICIOUS

PDF

45.6 KB Created: 2020-08-21 23:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 891973d1375b2aa803f71705802b0d87 SHA-1: cc5f80b1ebb602f401c436ffd110ac75c32b564e SHA-256: 5afed5bf442be0684d3deccc0580db91ac9cc4ae6053c3b0408a781dba2647f4
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised as a resource for "deduction guides c++ 17". The ML classifier strongly indicated maliciousness, and heuristics identified it as a redirector link and part of an SEO link farm. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware download page.

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.ru/pify?keyword=deduction+guides+c%252B%252B+17 In PDF document text
    • http://files.afinoentertainment.com/uploads/1/3/0/8/130874276/77bd63da9661f.pdfIn PDF document text
    • http://rikako.pipekeepers.org/uploads/1/3/0/8/130813612/7648218.pdfIn PDF document text
    • http://files.floridacda.com/uploads/1/3/1/3/131398036/3775610.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/1/0432/4635/4592/files/45785803956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/cataloguing_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/65498295413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/48227605995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/zezamirudixibujit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/bovose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/properties_of_hydrocarbons_lab_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/41870986180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/72035876721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.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 3

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_off00006baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAA 4900 bytes
SHA-256: d09acd6f37282562b2e33432089da66acf9e7887d52639401cded4a86107cc11
font_01_sfnt_off00007c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C79 14264 bytes
SHA-256: 6efe0ba3cf0dfa132b77f3718b22803b162b063c72c5e7412cf29323f3bd3edc

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