Malicious PDF — malware analysis report

Static analysis result for SHA-256 399c9500a934d371…

MALICIOUS

PDF

42.7 KB Created: 2020-08-14 16:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1e9684206f5c172e5b9623953041213 SHA-1: 8e09e790ae1788f34d14f1b04a558602563e73c7 SHA-256: 399c9500a934d371ad9c8642e7a30e9ccbc254103ab8a249c459d463e4ccd16d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Cessna 208 maintenance manual' and includes the URL https://ttraff.com/pify?keyword=cessna+208+maintenance+manual, which is flagged as a malicious redirector. This suggests a social engineering attack aiming to lure users to a malicious site.

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=cessna+208+maintenance+manual In PDF document text
    • http://fujadozu.vanessamariedewsbury.com/uploads/1/3/0/8/130874493/4463587.pdfIn PDF document text
    • http://files.assiniboiakinettes.com/uploads/1/3/1/8/131856176/bebavolufos-jezuwino-jekuj.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/1/0429/9338/5633/files/gotutiwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/52964534598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/pifed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/bijenoforenukevutuzabuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/christmas_carols_easy_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/33415239529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/gefikisubofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/64430256713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/rumble_fish.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_off00005d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 5220 bytes
SHA-256: c86721b1d171fef4b66d45b06d1bb725ab66c3a18680ed7d0fd2b5d361b7fd30
font_01_sfnt_off00006ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 14788 bytes
SHA-256: b9fcad8aee5264ef11edfa26933218ad1bfcb49c72f255d9c6ba7f913999b3de

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