Malicious PDF — malware analysis report

Static analysis result for SHA-256 57190e431aa924b0…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 21:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a06cb044ca2247b90d4a103dce574f1 SHA-1: 12e5cc75ea1cab4622087beec06317d596fd62c3 SHA-256: 57190e431aa924b0de0454f6db05c6dc6933f173f7a1196997c3867c9830671a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same topic as the redirector URL, suggesting a lure to a malicious site. No scripts were extracted, and the primary malicious activity appears to be link redirection.

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.com/pify?keyword=obesidad+bulimia+y+anorexia+pdf
    • http://files.somersetcountymemorialpark.com/uploads/1/3/2/6/132695351/tupavepaxawo-sanulagodapox.pdf
    • http://files.kiyawardshears.com/uploads/1/3/0/8/130814706/rexajubozuwokixep.pdf
    • http://files.liswimming.com/uploads/1/3/1/3/131380733/38dcd708119.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/kigekatetexuwodibax.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/kisujozijati.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/ridefelova.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/20296967370.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/bidesirakutabaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/kufofabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/71360711543.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/66734267391.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/goxelutanijize.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/gimosokipaxugalonesiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6316/4580/files/photosynthesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/sotijogoxezupiroxojuxak.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/poburuvilegitedoniteriko.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_off00005e63.bin
a65a338c68c3803bf4bd914e3d376bcedd8959f0631a13d155da96055358ebe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 5524 bytes
font_01_sfnt_off00007111.bin
e27f7713e5d81fff0b2d681ee375b754c186025a3546893134e5b22727c86373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 10252 bytes

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