Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11918d1c433c777…

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 09:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929af2969fe741927790f6794384f79d SHA-1: 0a4382bfb411b577f952412cf4b9ca1a29999eae SHA-256: d11918d1c433c777b0bd6881f43316c3cffe622f054bad9fec44d4fde2db9596
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'teaching phonics scholastic pdf' and the malicious URL. This suggests a phishing or social engineering attempt to redirect users to malicious infrastructure.

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.ru/wix?keyword=teaching+phonics+scholastic+pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8234/files/58948383530.pdf
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/mefininasuxomununawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/python_convert_list_to_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/kaylee_still_with_me.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/spiro_kostof_a_history_of_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/rawonevujafupivilof.pdf
    • https://cdn.shopify.com/s/files/1/0459/2707/1911/files/games_workshop_citadel_paint_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/cdc_influenza_vis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/cefalexina_bula.pdf
    • https://cdn.shopify.com/s/files/1/0454/7248/1438/files/wastewater_treatment_operator_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/xubufodojina.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/18398973408.pdf
    • https://static.usrfiles.com/ugd/a1fb72_8242b25c5ece488ba2cb5deb9f7bc815.pdf
    • https://static.usrfiles.com/ugd/9e41f0_9379c5d5ea354fe6af5c509691fb98a3.pdf
    • https://static.usrfiles.com/ugd/a107db_f2e4c5c079eb440fae093a36ab7a11f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f01ff7c3d394347bf32dd19df69c6b9.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_off0000576e.bin
f51056a4c2272b6cfec5ec1d4840dcd86a1dc4a894be52ac13b1e5189581ef18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576E 5268 bytes
font_01_sfnt_off00006953.bin
a5bacf4e29cedb0fbfda45ea6127e466e70924c4988bf2eedf6c391aa60e5c05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6953 9968 bytes

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