Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd369ad746e0a35…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 03:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60717edc16e1c41f6b7de5170a209761 SHA-1: 25f35468802b88889bbf61eb8bd02dfc9fb533ef SHA-256: 0bd369ad746e0a3574a36a3864bf5a4ab456e29b9fa82fe21e2361e0624d7ffc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external PDF links suggest an attempt to direct users to potentially harmful content. Although no scripts were extracted, the structure and embedded URLs indicate a phishing or redirection attempt, likely delivered as an attachment.

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.ru/wix?keyword=a%25C5%259F%25C3%25A7%25C4%25B1+fare+indir+full
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2400/6820/files/fcs_1_fin_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/treatise_cornelius_cardew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/fopufijipuzimezupakow.pdf
    • https://cdn.shopify.com/s/files/1/0429/0795/9452/files/wie_viele_Unzen_in_einer_Tasse_gekoc.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/11938349251.pdf
    • https://cdn.shopify.com/s/files/1/0428/7142/3135/files/capitalism_in_america_greenspan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0570/5374/files/probability_and_measure_billingsley_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0445/5052/0996/files/pygmalion_bernard_shaw_francais.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/21641405635.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/tunitobivowejakin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/38508324207.pdf
    • https://static.usrfiles.com/ugd/7198c1_0bd32b432871475385fdc8f1205ba8b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa4db6f9a45f48cb88f10a343208b50b.pdf
    • https://static.usrfiles.com/ugd/b8c837_50f07d5ac3c04be4a92b94ca5ad66941.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a75.bin
124754525f5999c100f434232d898d847de7e6ec6bbf7c9c9f394ee3e9f4f2f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A75 4864 bytes
font_01_sfnt_off00005ac2.bin
947b9b27353e99b2d796dcc9d33d2c38c679b18de79b7c67ee5bd249810830fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC2 10772 bytes
font_02_sfnt_off00007d45.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D45 4324 bytes

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