Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13754c921108a74…

MALICIOUS

PDF

36.9 KB Created: 2020-08-15 02:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca9b1b41edca5b3520c41b5900cfa31 SHA-1: 6c2fbc537b3ed752b714eeb07a9c32afa67088f3 SHA-256: e13754c921108a749cecf79edfd43dbce0b7d807a021cc4b61f9762b40883a22
150 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding a large number of external links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a gateway to malicious content. The document body, though partially corrupted, contains references to the embedded URLs, suggesting an intent to lure users into clicking these links. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=latika%2527+s+theme+piano+sheet+music
    • http://files.projectyouthextension.com/uploads/1/3/1/4/131410812/9024539.pdf
    • http://wijatalib.breezyridgegsmd.com/uploads/1/3/0/7/130776131/nutebibej_fedodinage.pdf
    • http://xorekobe.espgallery.com/uploads/1/3/2/7/132740353/8910ab239a3ca.pdf
    • http://files.upperarlingtonmusicacademy.com/uploads/1/3/0/7/130739570/pusasagovet_simozizusa_guwoto_jinevaxogit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovabokuvuxinapuwukiberem.pdf
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/sebiwijojesimefute.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/xarepenekod.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/guvepof.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/80844209275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/94847327155.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/dictionnaire_anglais_franais_arabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/blank_calendar_november_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/zarowubikapakebane.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_off0000515a.bin
bdaf7633728cf947e2d5f63ea6f98520debb0479060debabe9734854c008dbcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x515A 5084 bytes
font_01_sfnt_off0000628a.bin
48a7fedf3e75b7cdacdb1914229f350c6208c77c797f1e239555935a2d56cc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 10592 bytes

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