Malicious PDF — malware analysis report

Static analysis result for SHA-256 1166ccd358184ede…

MALICIOUS

PDF

45.8 KB Created: 2020-08-06 03:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 483874452fc70148a3ff3a35e0cdfc44 SHA-1: 41ceabc26cd40a02544ca3ff32492e24b9d22623 SHA-256: 1166ccd358184ede90cfcb4c741006b2ec687794e760bd690201247e077786bc
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) disguised as a download for an "Android studio developer guide pdf". This indicates a phishing or malware distribution attempt, likely using a link farm to improve search engine visibility for the lure. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence suggest a high likelihood of malicious intent.

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=android+studio+developer+guide+pdf In PDF document text
    • http://files.wayneswindow.com/uploads/1/3/0/8/130874477/4514532.pdfIn PDF document text
    • http://mimini.josephhickman.com/uploads/1/3/0/7/130775735/fofufefokeruj-bisebujusati-jararud.pdfIn PDF document text
    • http://boton.baijingbox.com/uploads/1/3/1/4/131453267/d5fd1c730e.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/1/0430/1789/6089/files/85835898721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/50695432953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/sipilalojufepamosololum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/43307920362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/gikuzukozizetofoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/beautiful_loser_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/dinosaurs_before_dark_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/autodesk_alias_tutorial_beginner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/tecumseh_carburetor_identification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/45940626339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/44329384336.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 4

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_off000072d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 5048 bytes
SHA-256: b02b2fcf1002a98335830b1d487ae477a0f729272b12f1cc3d2076543cbe507d
font_01_sfnt_off0000841d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 11348 bytes
SHA-256: 24bbd1d58d25f7d790955bf1af71507fcffccd7e58cbfd3b3e38da7f438c9144

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