Malicious PDF — malware analysis report

Static analysis result for SHA-256 875c97fc739c6bac…

MALICIOUS

PDF

52.0 KB Created: 2020-09-06 09:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09656cf9afedb6e9b4f68e194bdc5ff7 SHA-1: a97df3cfc82e671a1590ee7e5aff1c6d7473e5b1 SHA-256: 875c97fc739c6bacbf225b63935ad502a32f8c40cc2c376e9711629a23bd99f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially obfuscated, includes the text 'Livre guide michelin 2019' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=livre+guide+michelin+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3646/7619/files/dolinepaleremijoxipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/46724413349.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/21755299993.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6825/files/mixepowewarimivitebe.pdf
    • https://cdn.shopify.com/s/files/1/0462/8994/4737/files/motorhome_dinghy_towing_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/hse_carry_over_of_leave_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/jomuxemotokatuxigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5841/4236/files/saligolizujofikefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3766/2103/files/tejegikixivib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.pdf
    • https://cdn.shopify.com/s/files/1/0437/8565/0325/files/ti_winrar_._com._vn.pdf
    • https://static.usrfiles.com/ugd/20d83a_a4b3cfae672a48e0b162bbedc4b6c5c3.pdf
    • https://static.usrfiles.com/ugd/1a94e8_c5ad6d4c2f2e4c88ba6d77b5b3d95194.pdf
    • https://static.usrfiles.com/ugd/68ec51_4213a3a31137453d92ae7f266617568b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f190770c6c074c80a9063f0f03d98476.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d7f.bin
f2e86938f1d798d4858a10a2adb4170eece7117626eb71c4b88a4dea199b3853
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7F 5448 bytes
font_01_sfnt_off00009ff5.bin
06d84a508c89bc37d4d8e59f4972675b20c0b48174a676f27c7f6cccb8d9b593
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF5 10508 bytes