Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cdfd0957256018…

MALICIOUS

PDF

37.8 KB Created: 2020-08-21 17:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 365bfa2fae1a8b2b2d3a067653951152 SHA-1: 72077b2347a3617492c7a427779d01f63452591e SHA-256: 80cdfd0957256018e568cec00de5301e38c6f67a5579b9acd80af8beced711cd
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a worksheet. The ML classifier strongly suggests malicious intent. The embedded URLs, particularly the redirector, are the primary indicators of this malicious activity.

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=solubility+curve+problems+worksheet In PDF document text
    • http://vokek.steamychef.com/uploads/1/3/1/4/131482975/wofine_gafoxe_mopojag_kukonoz.pdfIn PDF document text
    • http://files.trebor-ts.com/uploads/1/3/1/8/131871690/4fa93.pdfIn PDF document text
    • http://files.encorecarpetcare.com/uploads/1/3/0/7/130739542/kepajiduziva.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/1/0448/1577/7954/files/465745274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/34607004543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/63789838516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/15298877768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/37615614654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/53292895650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/texawanugebexited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6546/5245/files/cbre_north_america_cap_rate_survey_h2_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/anne_ancelin_schtzenberger_ae_mes_aeux.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 8

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_off000053af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53AF 5524 bytes
SHA-256: e7688d106ac422cdf10ef85a4b9e9442fec2b6eb5f7788fae3331f3eaa54b5f3
font_01_sfnt_off00006664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 10188 bytes
SHA-256: 5d2ebd5e689cb8ee24bcacabd2268f620cd5882c02dfb6ac66b563dd3b786167

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