Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9528d70fa4b03c…

MALICIOUS

PDF

47.1 KB Created: 2020-08-16 11:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0ffae9dcf4e987c86f41c2c67ca5782 SHA-1: 7cdd54b637457e497555e650504f030429f5de1b SHA-256: 7b9528d70fa4b03cc7cc5cc79034bb4de5155734f2fa53bdbb52fd20e5c625d8
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to an SEO redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Appchina apk telecharger' and the same redirector URL, suggesting a lure for downloading applications. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=appchina+apk+telecharger In PDF document text
    • http://gedulu.knox-united.com/uploads/1/3/0/8/130814328/fajawutere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/mekuruxikegewawita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/harlem_shake_js.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/rubojajimoxedarowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3159/7980/files/92468222356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/blood_type_diet_food_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/liwojewovinokarukin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1440/3742/files/aya_beshen_nude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9605/9547/files/introduction_to_automata_theory_languages_and_computation_pearson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/97374403665.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 3

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9E 4748 bytes
SHA-256: a131e893b5208c9bf1077db7b5b27d2d24eb18f919a585f41395840f6aa114dc
font_01_sfnt_off00006aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 9864 bytes
SHA-256: b9b653fd14ef31349d93058a070786ab70fa215a15175c65021f8055f50bee8f
font_02_sfnt_off00008cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAE 16112 bytes
SHA-256: 055dd542a75b41b8c12c294075aad027c1d82da78fa3869ad2cdf6bcc3138586
font_03_sfnt_off0000a189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA189 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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