Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5b0ddf91d205dd…

MALICIOUS

PDF

49.4 KB Created: 2020-08-19 22:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42bbb2545f0a1ef653abfd330ced9cce SHA-1: e1a71051d7f8e5bdbc72be83cfd329793b532197 SHA-256: 8a5b0ddf91d205ddd547f0d560f22482aae6db39f029b4e26f57091a2935d841
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=free+job+resignation+letter+template'. This URL is presented within the document body, disguised as a job resignation letter template. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains. The primary malicious URL is designed to redirect the user to further malicious content.

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=free+job+resignation+letter+template
    • http://files.murdockcounseling.com/uploads/1/3/1/1/131164081/nukokujo-visumal-bibepigon-zuvanufugidak.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/calculus_early_transcendentals_2nd_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/sipawajamunopuvot.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/raniduzavixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3155/files/tremble_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/fumenav.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/26167143471.pdf
    • https://cdn.shopify.com/s/files/1/0437/1703/4134/files/cloak_12_pro_lights_out_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/mac_dre_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/2607/1199/files/doxepizuke.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/2491970294.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007277.bin
4b7f84aa283e3e5845c60e71e3cdba6437216b7bcbba0bf9c703ffac890ffbd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 5096 bytes
font_01_sfnt_off000083b5.bin
cf012f90aa0f3215555f3d360b00dc9db248bce356e6f88648a4af7b6865fa32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 12072 bytes
font_02_sfnt_off0000aab0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAB0 4324 bytes

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