Malicious PDF — malware analysis report

Static analysis result for SHA-256 099ffcc5436cc7af…

MALICIOUS

PDF

40.4 KB Created: 2020-08-22 07:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e81fc8fce7bbedf0a992821172533c3 SHA-1: 881ea7741210e95b86a32fe27846c1c448411b8a SHA-256: 099ffcc5436cc7afec68cc1b44ee756b7c6b53a0947eca10d1d565c1288f382b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=interview+writing+format+ssc In PDF document text
    • http://files.longsilverconstruction.com/uploads/1/3/1/3/131381799/2627383.pdfIn PDF document text
    • http://files.ninemillionbicycles.com/uploads/1/3/1/6/131637021/lotoverepitapeduz.pdfIn PDF document text
    • http://files.ornamentalhenna.com/uploads/1/3/0/8/130815009/lisijiwofagusezuz.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/1/0430/5754/5365/files/65493403200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4456/1319/files/bbc_iplayer_ipad_outside_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/kunenakidesajabajor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/emulator_android_untuk_linux_mint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/zenapodelalufufovoxebifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/discord_rules_suggestions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/xizegeluvururoturaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6425/2823/files/ever_after_high_soundtrack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/foxarenizod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/old_navy_coupons_printable_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/96346384979.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_off0000615a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 5256 bytes
SHA-256: d75c91d19866d46a542f0d1f08179cfed4b7ee218d5825f82f66883cd2040fad
font_01_sfnt_off00007335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7335 9932 bytes
SHA-256: 64469a63d86b961c1b3505fb499a2628e1d4db87cdbdc433ac874f363e560a83

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