Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c062cd5d33eab2b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-08 10:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f459a45593d585e3b1136247131a5a4 SHA-1: 9cd04a6ea28e3e276894a90caaa2654b8cc12902 SHA-256: 4c062cd5d33eab2bc543fc0a884bee7871aa0e360257758cfae2781f55ff58ad
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, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.com/pify?keyword=anatomie+descriptive+de+l+estomac+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title and metadata, suggesting a lure to disguise the malicious links. No scripts were extracted from this sample.

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=anatomie+descriptive+de+l+estomac+pdf
    • http://files.ajoyfulcreation1.com/uploads/1/3/0/7/130739472/vipisajekuwonoro.pdf
    • http://files.jefferyedoherty.com/uploads/1/3/1/3/131380058/1610684.pdf
    • http://files.chennaishiayouth.com/uploads/1/3/1/8/131856743/revakixegubixeju.pdf
    • http://files.811x.org/uploads/1/3/0/7/130739628/begemevebevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/infarto_maligno_arteria_cerebral_media.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/actos_del_hombre.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55497749658.pdf
    • https://cdn.shopify.com/s/files/1/0450/3538/9086/files/o_abacateiro_bagunceiro.pdf
    • https://cdn.shopify.com/s/files/1/0436/9547/2794/files/bosch_dishwasher_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/20607618674.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/gelimifejesepiputukomim.pdf
    • https://cdn.shopify.com/s/files/1/0447/1321/4108/files/the_beatles_complete_guitar_chord_songbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/pasatefi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/tda2020_subwoofer_amplifier_circuit_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/dubeporarizixigeleg.pdf
    • https://cdn.shopify.com/s/files/1/0435/3402/4855/files/name_of_the_wind_movie.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_off00007b22.bin
df91276d34a873acf2bfcf0114324dbd73c32fc1f5f55efb536d5694c239569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 5352 bytes
font_01_sfnt_off00008d48.bin
d74eaa266be8e3ae2c02250c9b97d151e9b5b3954177d002962f440ec6b63dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 12584 bytes

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