Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7308fb0c9e0503…

MALICIOUS

PDF

46.9 KB Created: 2020-08-18 20:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b653867648ac2d4e417a9f2febd49c65 SHA-1: 72c91549fa1a2d3b48bb1a821e33bc07aaedbca5 SHA-256: 0d7308fb0c9e0503f8138ca264d97cce5ecd6b9770555c919c006a2347d401e5
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a link to a 'deped monthly accomplishment report template'. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=deped+monthly+accomplishment+report+template
    • http://files.eastbernardpto.com/uploads/1/3/0/8/130874115/8e056365.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/mabibunipewuzaloburevuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/simoganozewove.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/datezarukep.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/dikojibekokovewapakenuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/nadujatekokem.pdf
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/69909173264.pdf
    • https://cdn.shopify.com/s/files/1/0439/3045/2123/files/87210429656.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/18729132006.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/ligadura_de_cordon_umbilical.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/lawepajezalifa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/83509266753.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/auxiliaire_de_puriculture_fiche_mtier.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/daduzexavewetulomat.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_off00006b15.bin
e8e066d07819877445ba942453fd60204b6a73e063ef48447ae138b9d666d49a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B15 5204 bytes
font_01_sfnt_off00007c93.bin
056c0f3e3bcaac9d0fa61ccc9c321b080ae5efa0595b214fe758a87d3bcc1459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C93 10480 bytes
font_02_sfnt_off0000a05a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA05A 4324 bytes

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