Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea8e745e24c5a1f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-11 16:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42ef64255730249150c94f8cd8275c7d SHA-1: fd415db6a8dd2fc41c788b17280f1f8acfed607f SHA-256: 3ea8e745e24c5a1fbf6c714f812f9e3bb4e706ed48b267553f5082696ac5a8d8
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 of the embedded links, 'https://ttraff.cc/pify?keyword=determinants+of+academic+performance+of+students+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to academic performance, likely a lure to disguise the malicious intent of redirecting users to potentially harmful sites.

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.cc/pify?keyword=determinants+of+academic+performance+of+students+pdf
    • http://files.nealybirthandlactation.com/uploads/1/3/0/7/130775025/93c4ce71e.pdf
    • http://files.bargeadhesive.com/uploads/1/3/1/6/131636814/9822e5130d88b3.pdf
    • http://files.effectivekckschoolboard.com/uploads/1/3/1/3/131398479/xikewokitat_gudobuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/15663645160.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/puwolitijupor.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/california_yellow_immunization_card.pdf
    • https://cdn.shopify.com/s/files/1/0438/6763/5867/files/51377471106.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/pilotedebolazogalinuzeka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/88943058701.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/25642071728.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/odt_en.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/47666398623.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/holistic_nursing_a_handbook_for_practice.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/velinobefofazopizerozuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/all_arduino_sensors.pdf
    • http://www.flickr.com/photos/alamosbasement/
    • 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_off0000626a.bin
94e58f640e396ea12772f8c07395842aa471fe5414401dfe0531e55525342a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626A 5268 bytes
font_01_sfnt_off00007438.bin
7784f52f28c6dc2d95435005d891fce92aa1d4b909567d58e6ecbb73d7f22f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7438 9700 bytes

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