Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5013513e1ec57e…

MALICIOUS

PDF

42.7 KB Created: 2020-07-11 00:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 321f6501a223631bc6f769ad184e9131 SHA-1: 5bdfaf62a427cf578825ce5317746f35642bfc1f SHA-256: ff5013513e1ec57e4be61493d9c02a22fa1f75640f28418ab2f266dc5a64ca36
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary redirector URL is https://ttraff.cc/pify?keyword=anders+zorn+book+pdf, which likely serves as a lure to download further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a campaign to distribute malware or phishing 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.cc/pify?keyword=anders+zorn+book+pdf
    • http://files.northeastchristiancollege.com/uploads/1/3/1/1/131164568/rovezumuloxudi-likunosixi-talopiwavav.pdf
    • http://files.m.teakslockservice.com/uploads/1/3/1/0/131070895/jezovo.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://files.rockvilleintegrativetherapist.com/uploads/1/3/1/4/131483318/jejame_farok_jilidenem_tuvuj.pdf
    • http://files.whitethornherbals.com/uploads/1/3/2/6/132682386/sumixoluxadegipu.pdf
    • http://files.pageuptraining.com/uploads/1/3/2/7/132711983/c9f3332cc1fd1.pdf
    • http://files.theknitknits2.com/uploads/1/3/0/7/130739895/gokaxap-pofimaluwokal.pdf
    • http://files.johndmc.co.uk/uploads/1/3/0/7/130739294/e9e77.pdf
    • http://files.rubydelangelphotography.com/uploads/1/3/0/8/130814984/0a38d988.pdf
    • http://files.sacpb.org/uploads/1/3/1/3/131379951/9136172.pdf
    • http://files.trebor-ts.com/uploads/1/3/1/8/131871690/4fa93.pdf
    • http://files.bark-blaster.com/uploads/1/3/2/7/132741155/ce84b7ae2fa2e96.pdf
    • https://megaxosu.files.wordpress.com/2020/06/24369354182.pdf
    • https://jilijufupe.files.wordpress.com/2020/07/99598584787.pdf
    • https://vutazig.files.wordpress.com/2020/07/vafezabif.pdf
    • https://mopekataba.files.wordpress.com/2020/07/51781144325.pdf
    • https://wunugevakel.files.wordpress.com/2020/06/99895073458.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/jipumovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/37597576841.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/pogeveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/nusunudomuvufupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/desepinonisejamitogar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b34.bin
4d4c347027f1ab6b8ddc23b7e4748ecab5c0693285cf601bfd8a2fefff113d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 4696 bytes
font_01_sfnt_off00007b28.bin
b6c6d995fcc158ab085c28c93e1f781d61b658886ed6202e7236283025838d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B28 10224 bytes

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