Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ec6adb1b886ebd…

MALICIOUS

PDF

53.3 KB Created: 2020-08-29 00:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af55c02b9a9ee098ec1e1ed53005dbd1 SHA-1: 6b69eb1c3280824be557d3bb8ee62f7e7fb6e2e5 SHA-256: 82ec6adb1b886ebdf0549d68e91ab38ee3afa8da3179b419691cdc0e2da7b9bc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a free muscle-building trainer, which is a common lure for phishing or malware distribution. The ML classifier strongly indicates maliciousness. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious URL. No scripts were extracted, limiting the analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=kris+gethin+12+week+muscle+building+trainer+free
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/3971109347.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/pepewezemogaxuzesa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/docthan.com_-_gi_t_cuc_sng_c_t.pdf
    • https://cdn.shopify.com/s/files/1/0462/6766/2490/files/95095835724.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9163/files/cd4050_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/jezajipokepimaba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c7e713feac942cc815220b9f6045148.pdf
    • https://static.usrfiles.com/ugd/b8c837_59962bd600ad464d9eb0dc9e5e75b475.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4b2e687be3540d99d19a2a5fd6e3dc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_efdf07196f7542e7bbee4b81f1efb6f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d33abb047e1d4cc7adca1459c80b1f3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_59576f33e5104edd9ab1cbd62367a1f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_efefcd1dc6be4d60a5485c2ced8d6de7.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_off00008ff8.bin
ddcf46e432004000d4ff9684d10b4feac398511f11af6c43c5b84161ed33081b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF8 5884 bytes
font_01_sfnt_off0000a3e5.bin
822ba68c9a9acd0901036fbd78b06ea2fd2b1cae1fd69e593eaf2c886de7d628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E5 10540 bytes

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