Malicious PDF — malware analysis report

Static analysis result for SHA-256 a092b158b3782cdf…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 19:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f859aa3d8da7c448d15ee6098facdd SHA-1: 9f1ccf420a2ea0205967dd9653c2f323f1064a24 SHA-256: a092b158b3782cdf71c5d060d0d70c1b9a6ab0e002f6ad1534cddd9323323679
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous external links. One of these links points to 'ttraff.com', which is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's a primary lure. The presence of a large number of external links, including the malicious one, indicates a likely attempt to redirect the user to a harmful site.

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.com/wix?keyword=dark+souls+ceaseless+discharge
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/17078949047.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/ffxiv_overlay_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0435/5165/4047/files/bigapifomidej.pdf
    • https://cdn.shopify.com/s/files/1/0457/9183/8364/files/8145997370.pdf
    • https://static.usrfiles.com/ugd/704566_778646562f9f4764a360c23be083b35e.pdf
    • https://static.usrfiles.com/ugd/0a052f_98b4eb5d4afe4fd691e88215649bbd08.pdf
    • https://static.usrfiles.com/ugd/b8c837_69864e2194be4bcab8c9cf96bf64d9ec.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_c6ac4ae70be640dca7909a71c0646c2c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/zijolanovaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/83371241378.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/51746272324.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_off00007200.bin
aeac66f6b9d83098c7faeb5b14f61fb3b71a614c40927418992114737ef24981
pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 5264 bytes
font_01_sfnt_off000083e0.bin
089a6c93134d2f4b1124b5553298fe3d6d576065d7adf807aa2cafe12cf47bb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E0 10172 bytes