Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca7eda1d2a0b660…

MALICIOUS

PDF

54.2 KB Created: 2020-08-19 02:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61d8cd459f1dd0a3979efa83723dc4d3 SHA-1: 238c6a105041fea5c49cb6ea86549e26a115c413 SHA-256: 8ca7eda1d2a0b6608309fa6a78b4faf47a9a84adb3c0725dc1f9c50aafff37cc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that triggers the redirector, indicating a lure for users interested in 'best games for android'.

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.cc/pify?keyword=best+games+for+android++apk In PDF document text
    • http://files.wgct.org/uploads/1/3/0/8/130813427/pojusanozomi-finadunefaf.pdfIn PDF document text
    • http://files.cassowaryfestival.com/uploads/1/3/2/8/132814250/161fb0.pdfIn PDF document text
    • http://zasefixi.freezerlink.com/uploads/1/3/2/3/132302921/50850.pdfIn PDF document text
    • http://files.muslimahcommunitygroup.com/uploads/1/3/1/6/131606666/d32f7.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/1/0433/0687/7080/files/nulexukiwogefera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/minelimoreg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/95863335712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9841/0918/files/97119177837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/rozosibojazido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/the_economist_style_guide_12th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/jawamoguvur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/42809354136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/mawawevizulolukuvixidepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/xikelokareto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/42863273517.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

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
stream_005_off0000a570.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA570 21672 bytes
SHA-256: b4aaae62bbcee564f59159e0a3480f7099ab87e23225c433ca584ca983c9aed5
font_00_sfnt_off00006ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFE 5440 bytes
SHA-256: 078f5d2412277c5cdfc4a764e223c86b69f80cf4dbd416c741dc54cd6aa5852d
font_01_sfnt_off00008272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8272 10224 bytes
SHA-256: 589c3d826918e6b3a7e639f5a7ec8f44296209b8eec02cb5ae8342dcb3fcc477

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