Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd1edc101178aee…

MALICIOUS

PDF

47.5 KB Created: 2020-08-19 09:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4dc67284a7796f3d3c84a2033d6595e SHA-1: 5a0aa8451458d4e8609dae04b540e84536c2db16 SHA-256: 0bd1edc101178aeeb836c9b81495d4c59a1e1e70202cfbca7a570e41fc6789d7
162 Risk Score

Malware Insights

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

The PDF contains multiple links, with one specifically leading to a known malicious redirector infrastructure. The document body text and embedded links suggest a lure for downloading software, likely a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=adobe+acrobat+reader+pro+trial
    • http://files.gracebaptistchurch77.com/uploads/1/3/2/6/132682802/0e6f14cf35f3435.pdf
    • http://files.heavenlystringorchestra.net/uploads/1/3/2/6/132682919/37d08b256cfb.pdf
    • http://lisebutam.egypta.org/uploads/1/3/1/6/131606490/buwefakuxixijed.pdf
    • http://files.hubbubmagazine.com/uploads/1/3/2/7/132740250/8567aa9a3f6e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/85961254160.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/club_car_troubleshooting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/belkin_range_extender.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/naxwaha_af_soomaaliga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/62604635625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/74676738597.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/nugogemovurirojetesunef.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/5845639027.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/alter_ego_b1_guide_pdagogique_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/knowledge_encyclopedia_books.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000514c.bin
60a0da8404760875dc639e20ffb491823417469a2fb3a7687f1dfc2d799d8d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x514C 5236 bytes
font_01_sfnt_off000063b6.bin
1eaeb9498fe0df109cef8aea4065edb6cc9730b607c4da4fbe366bd3808edc2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 5016 bytes
font_02_sfnt_off000074d3.bin
6a6c1455dc620e0d8d56ab2dd9e635c912b675bd7b986026ce711ce75f76fd97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D3 10240 bytes
font_03_sfnt_off000097df.bin
b88c55219ef84bd2ff48a12f23060c6b86d25efbafe4a8493ce51f9ac91249ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97DF 16488 bytes

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