Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ec4148c9b85a63…

MALICIOUS

PDF

45.9 KB Created: 2020-09-01 03:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfee27ca89cbd8bb3e1de2b6e86759f2 SHA-1: 0025b92ec7a3587eb804bfd2d20d3f47f7b63c5f SHA-256: 42ec4148c9b85a636240612fd8dc5305669b2011648b09822a80d69f95438339
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=marvel+future+fight+apk+data+offline'. This URL is likely used to funnel users to a phishing or malware distribution site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=marvel+future+fight+apk+data+offline
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/44094229591.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/gufoneb.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/widebasowunubixixezufufa.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/mofupuxom.pdf
    • https://static.usrfiles.com/ugd/345929_15e84323602d4982849c80b1c4191f98.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_6f232333cc1e434889b9b89683e00bfe.pdf
    • https://static.usrfiles.com/ugd/b8c837_c080850913a1470aabe575ec17ed4d95.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22341427f8f4d27855f576d3dc0180f.pdf
    • https://static.usrfiles.com/ugd/22bf55_86110d726711472b92e260037309f160.pdf
    • https://static.usrfiles.com/ugd/b8c837_edb9d486f54e45719e2945602168d400.pdf
    • https://static.usrfiles.com/ugd/5e81b9_1a4804a39c284f86987721a1ee3d87bb.pdf
    • https://static.usrfiles.com/ugd/05900a_9fb044da0af44e6685455efee1e571bb.pdf
    • https://static.usrfiles.com/ugd/a467d2_7755b11602b3454a97000507411d9c00.pdf
    • https://static.usrfiles.com/ugd/b8c837_81b48788db024d088584af02255238f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_99ea93d438a34e9a980688eeb3c53495.pdf
    • https://static.usrfiles.com/ugd/eaf48f_e0ce23b1d08d43bdadf5ddd74c8c0aef.pdf
    • https://static.usrfiles.com/ugd/0adedf_108d8ea46acb4e76863ced0f2c505c8d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006804.bin
53a32e1fdb49d67482af5d7316c40c6bde99049b08899755f579cac3394b6046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 5136 bytes
font_01_sfnt_off0000797d.bin
5ff17b7f42a5f195a2847a6ac0c2066e7f455a9d393fcbe90456cb48feffb8bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797D 10160 bytes
font_02_sfnt_off00009c58.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C58 4324 bytes

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