Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9b3990b6677d68…

MALICIOUS

PDF

47.7 KB Created: 2020-08-26 15:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da317abfc63582e3a0129ec059b67ce8 SHA-1: 1973ad0242d22ea0daddc29d8d5d86fc3210005c SHA-256: 5a9b3990b6677d68d4398d504dc57ff4ff5502e216d49c3f7888103a2310719e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into downloading potentially harmful content. The presence of multiple SEO-optimized PDF links further indicates a link farm or phishing campaign.

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=capsa+susun+hack+apk In PDF document text
    • http://jisil.northwestmontanagoats.org/uploads/1/3/1/4/131483281/jisulizasimo.pdfIn PDF document text
    • http://files.bgprodaniuk.com/uploads/1/3/1/0/131070178/nejutebus.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/1/0432/3927/6699/files/live_football_tv_streaming_hd_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2624/0920/files/26431958303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/77416724437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/40070847884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/56348379369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/application_of_nanotechnology_in_cosmetics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/42858230079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/itunes_for_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/4078272127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5522/5763/files/kexilitopunek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/cell_organelle_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/voriroxisamewinafiwifavun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/72125422502.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 4860 bytes
SHA-256: ef2e1dde3b7a97eaa74d2993b1f97caf3e2e192178d8447625508b70950d8c6f
font_01_sfnt_off00007774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7774 11452 bytes
SHA-256: 352a876099fdef4184a0ce020e372e3ad0dbfa0a73ca46ac5a7e29dfa9311c6f
font_02_sfnt_off00009d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D09 16096 bytes
SHA-256: da9784c099e5a8bc41ab28ab6b0f706bbb561d129e983fef757841920625d5e7

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