Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dc76cb2a7a7a2c…

MALICIOUS

PDF

40.9 KB Created: 2020-07-31 10:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b1be77f85bffe05a8da605bdb5522ee SHA-1: cdd5585c6a799e909bf61be3c21168ab69ab8bd3 SHA-256: 77dc76cb2a7a7a2c2405a62746717425d1b79bf81e0edf768305178153ab06f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links, including one pointing to a known malicious redirector (ttraff.cc). This redirector is likely used to obscure the final destination and potentially deliver a malicious payload. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to attract victims.

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.cc/pify?keyword=kitaaba+afaan+oromoo+kutaa+11ffaa+pdf In PDF document text
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdfIn PDF document text
    • http://files.laureltherapy.net/uploads/1/3/0/8/130813646/nozubipuxokekin_bimidatuwaguba_beregogudatuvos.pdfIn PDF document text
    • http://files.goodtimesgv.com/uploads/1/3/1/1/131164386/ziwav.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/1/0427/6705/7063/files/tokusokijumalozox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/54829609915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6539/9713/files/karavigajorisija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/14545388052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/popepasowuwunalatalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/sidulegisoloxovonopunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/16332461397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/269130939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/47508508976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/lujuragerigejaluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/34220077858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7063/3624/files/48832009045.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_off000059e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E9 4964 bytes
SHA-256: b805db8f27e317974cf3d873e61b78f0646808e7dfcc01e999fb0df059056a4f
font_01_sfnt_off00006aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 13544 bytes
SHA-256: 1756585a8fdf3a703121ea49cec173984210cb01998816c8a66b9544788a7ca5

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