Malicious PDF — malware analysis report

Static analysis result for SHA-256 7670bb7933494b87…

MALICIOUS

PDF

42.2 KB Created: 2020-09-10 03:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b38c04af24051286dc77344baee008c3 SHA-1: 3f339450527c1abc750668aec3f48a2d4f858c78 SHA-256: 7670bb7933494b876233f2261b95ecdbd48bf2a8dec03ec96a72b0fa56f507a0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'bowling ball buyers guide' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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.link/wix?keyword=bowling+ball+buyers+guide
    • http://files.harvestfieldbaptist.org/uploads/1/3/1/0/131070309/5069351.pdf
    • http://files.letschoosejoy.com/uploads/1/3/0/7/130775934/gerorepeputibuj.pdf
    • http://files.mammologix.us/uploads/1/3/2/6/132696210/3204733.pdf
    • http://sobalupi.consolidatedpropertyservices.org/uploads/1/3/1/0/131070786/gatapikovukokebuwug.pdf
    • https://cdn.shopify.com/s/files/1/0448/0725/8269/files/pattern_recognition_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/78205364435.pdf
    • https://cdn.shopify.com/s/files/1/0433/8198/1347/files/camera_lenses_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/vagiselisafasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/nilojidowasawejefujig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/53441990421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9646434013.pdf
    • https://static.usrfiles.com/ugd/135178_6263bee6e9f741e8baaffef8e847ba52.pdf
    • https://static.usrfiles.com/ugd/dcc11b_9bc64c11370641bba47f98ced9b97610.pdf
    • https://static.usrfiles.com/ugd/8c2e83_187c78656d7247ca8299a221fa7b2ffd.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_off00006689.bin
d1fd3f80308b202ade90cb788bda5d8963d54754b5bb5455b236dd5f6a842044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 5376 bytes
font_01_sfnt_off000078f3.bin
de40bd500218b03f41528bfb680498eba159f154b7fc0001f4d6fce0900fa80e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 10312 bytes

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