Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5825b8c7350a59…

MALICIOUS

PDF

45.6 KB Created: 2020-08-18 22:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ef6e8fc25d31f4ad196728322dff86e SHA-1: 1a6970628587bc8745a3f368d57382a140c22b49 SHA-256: ef5825b8c7350a5983d9ebf5fa974fdf974fb1f010ed2d463136dc113615bcee
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to 'chakravyuha songs in telugu', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious redirector. The primary malicious IOC is the redirector URL.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=chakravyuha+songs++in+telugu In PDF document text
    • http://xoxupulo.santiagolopezphoto.com/uploads/1/3/1/3/131383483/2792786.pdfIn PDF document text
    • http://bunila.mbcnavarino.org/uploads/1/3/1/8/131856158/jodafobaxad_vazakamusonu_tagope_wowaparenexi.pdfIn PDF document text
    • http://files.grewbuilding.com/uploads/1/3/0/7/130739945/db6ebe.pdfIn PDF document text
    • http://files.martialhartamas.com/uploads/1/3/0/8/130814279/6186ec0be38b.pdfIn PDF document text
    • http://nerifi.forestknollsbeach.com/uploads/1/3/1/0/131070487/130e6.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/1/0430/9696/5269/files/cassandra_fox_dance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/rimubuzip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2439/1071/files/zegelovodezud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/20688129732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5161/4359/files/lava_song_sheet_music_ukulele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/jazofekakunoriwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/ti._paper_trail_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/asus_smart_gesture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/asus_rt-_ac5300_optimal_settings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/48844460884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/42058693024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/kozojebulox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/ktu_b_arch_syllabus_2020.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_off00007139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7139 5080 bytes
SHA-256: abc65de4638472908a583057dc9411e0aaecc9b3a74de5d811718e52321f7e32
font_01_sfnt_off0000828e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 12292 bytes
SHA-256: f97c172363e85419d4701a9df18bfb04f44e1845a4caabc5fcc1a3f09cc44013

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