Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c889cc78c15302…

MALICIOUS

PDF

47.4 KB Created: 2020-08-22 06:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14e517b9e6870ca985ad6ad552b3d6b2 SHA-1: 29666dd686c1818d796d1326a85564bb866d7f32 SHA-256: 16c889cc78c1530209168ab537a2ffcc52acc641be3380882d6cd4d9e087c82d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though partially garbled, suggests a lure related to 'Bg voz' (transport information) to entice users to click these links. The presence of a large number of external PDF links, including to a redirector, indicates an attempt to lead users to potentially malicious content or phishing sites.

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=bg+voz+informacije+kontakt In PDF document text
    • http://files.elizabethkilcoyne.net/uploads/1/3/2/7/132740250/vofaxatiruda.pdfIn PDF document text
    • http://files.skylikesnow.com/uploads/1/3/0/7/130738619/848ad9654adb.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/1/0432/3042/9346/files/baby_shower_invitations_templates_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/7770705636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/53525739073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/vajatolapur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/nobadobovij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/96077157232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/48706339290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/inductive_approach_in_teaching_grammar.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_off000070b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 5292 bytes
SHA-256: f4d1abdd3aa35f5b837c2089596c8978b263921618c2ee6eab89c60fb84ce563
font_01_sfnt_off000082b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 15136 bytes
SHA-256: c6dd559681903a8360ae97e7d5a0673365be697480d139e6489efcd9527b502f

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