Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed668a92796ffa4…

MALICIOUS

PDF

50.0 KB Created: 2020-08-20 19:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e486dcebedfde3c49b8a41133d7d86f1 SHA-1: 421cc5ded4441bfc9ffe4bc64acb85bd2057e344 SHA-256: 9ed668a92796ffa4bb428e9cb4b215e24c122e159674baa8260a8dfac247f648
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One of these links directs to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of these links as a primary attack vector.

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.cc/pify?keyword=alphabet+phon%25C3%25A9tique+international+anglais+pdf
    • http://files.artandroulla.com/uploads/1/3/2/6/132681657/wobaxazup_vuzetimi.pdf
    • http://jilaremid.marinelifeproductions.com/uploads/1/3/0/7/130775432/wuxesipuv-wakafolepawab-xarapoxevaxiwo-kabuguxaxatu.pdf
    • http://files.bulletproofcannonball.com/uploads/1/3/1/8/131856398/dutagijujadif_lavuxemivorepug_nibasabepuwuxal_befugavunevop.pdf
    • http://files.backlotcoffee.com/uploads/1/3/1/4/131407135/fedfb73.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/38751576675.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/93047255535.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/42861809095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/rise_and_fall_civilizations_at_war.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/56733898969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/normal_and_abnormal_gait.pdf
    • https://cdn.shopify.com/s/files/1/0438/4591/0678/files/84078252104.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0822/files/aol_mail_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/concierto_de_aranjuez_guitar_solo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/92582179239.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/92465962158.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_off000072cf.bin
70cee21f64bb51b19df7fc0d5ab1436ea485d87c93a996304890d168608d3c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CF 5700 bytes
font_01_sfnt_off000085cb.bin
2a5cc51841a93c8f0604adb8ce33711364a2b1f2f37b64fbd87c522666dd2cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CB 17060 bytes

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