Malicious PDF — malware analysis report

Static analysis result for SHA-256 9951df21d4b70257…

MALICIOUS

PDF

40.2 KB Created: 2020-09-19 11:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ff72885782c448129e2d080138698fa SHA-1: 13a25d7f8bb4efbc086e91c6baf9f13927f3aab5 SHA-256: 9951df21d4b702578d0a85b78a04bf263ec244c3f59ca2cbfb1ac6b49b952283
150 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.me, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains text related to a "love compatibility test" and the malicious URL, indicating a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=love+compatibility+test+unblocked
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/xizavitojapoputitano.pdf
    • https://cdn.shopify.com/s/files/1/0481/6096/4761/files/wow_bigger_fish_to_fry_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/7739/2794/files/apps_2020_imo.pdf
    • https://cdn.shopify.com/s/files/1/0462/8584/8737/files/wepezizepevoranexed.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/somerset_dough_sheeter.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/91148912695.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/sick_puppies_riptide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/cobalt_tinkers_construct.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/wimuxugetepabulekebo.pdf
    • https://cdn.shopify.com/s/files/1/0466/4095/5557/files/lavevojuzonafuza.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/1977592014.pdf
    • https://193f872e-fea4-4e53-8517-7256f713a5d2.filesusr.com/ugd/bc4951_aa5ee999a2c4405692eec80d6bfe3b10.pdf?index=true
    • https://610ba7ed-0e35-414e-9f3e-b09cef9c9e2a.filesusr.com/ugd/9d66c7_c7c8091b3df04901aa499e2188fc978b.pdf?index=true
    • https://7ed1bf39-4e66-4d9d-aade-b6370716503f.filesusr.com/ugd/a771bd_845738255c1143998ae7a25774cbe43e.pdf?index=true
    • 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_off00005e70.bin
1f505620c380a91d2bb06596d013a115c1078a06f968862941f771a816dbdb66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70 5428 bytes
font_01_sfnt_off000070dd.bin
d806e2ebb9915365492f6097d2a10d424099893ed840a90dd8f6182bae9f995e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 10260 bytes

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