Malicious PDF — malware analysis report

Static analysis result for SHA-256 878b099ca7a3d033…

MALICIOUS

PDF

42.4 KB Created: 2020-08-26 09:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 740ec2597990ff6b9062fb23745463eb SHA-1: 94f0d7b77cc32ba74e19923140b632da098f1d1f SHA-256: 878b099ca7a3d03392e9561279c689a75104006900202f9c8cbaf2bce47da369
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a job application. This is supported by heuristics indicating a malicious redirector and a link farm. Although no scripts were extracted, the embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

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.com/pify?keyword=job+application+letter+for+accountant+assistant+pdf In PDF document text
    • http://files.monakansoh.com/uploads/1/3/1/3/131397987/povuweleka.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/1/0434/4990/9415/files/45150001927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/free_movies_websites_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/jozewevugetuvekodigewepog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/toefl_sample_tests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/2488/3352/files/42622899010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9611/9198/files/ledupetivipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/xugefexafivenadugonogek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/zesixarus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/37200455847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6690/1924/files/seamless_pipe_sizes_in_mm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/the_air_he_breathes_brittainy_c._cherry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/66817212072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7779/1897/files/predator_8750_generator.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 2

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_off000066a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 5276 bytes
SHA-256: 7f42900d74a072fbc6e1b783694c4cf58c820a63b30dc9d173ecc086e0c54a5f
font_01_sfnt_off00007892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 10472 bytes
SHA-256: d7a863928c406dfd09ef7e75d270c23559241bab6de7e34711116f9d149a09b5

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