Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe461284fa184b1…

MALICIOUS

PDF

48.7 KB Created: 2020-08-05 06:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a52cb0a2b8f393abd61255cf837509 SHA-1: 5f4ae058637c635c037733b55b547edfda627c46 SHA-256: 3fe461284fa184b19eae78934dbe219995e859a7cc601b82f441a938522d531b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service, 'ttraff.cc', which likely serves to obscure the ultimate destination of the attack. Another heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content broadly. The document body contains metadata and a URL that appears to be the target of the malicious redirector.

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.cc/pify?keyword=adizes+corporate+lifecycle+pdf
    • http://files.aflunky.com/uploads/1/3/0/7/130775009/1731740.pdf
    • http://files.iconiumbackpacker.com/uploads/1/3/2/6/132682528/watawizonufinuz.pdf
    • http://files.nationalchildrensdayuk.com/uploads/1/3/1/3/131382841/8016114.pdf
    • http://files.rochellehallconsult.com/uploads/1/3/1/4/131454034/nijagokizawoni.pdf
    • http://files.cbckokomo.org/uploads/1/3/0/8/130813694/jixat-peratovekedin-gavafefofabi-pamokikizolavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/58924589483.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kivamusefelozadadazub.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/talugenunojigu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/bobby_valention_tell_me.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/kafupizerigip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/duxomenudatibulufutokoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/45825024213.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/tmux_name_session.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/84738554093.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/nurak.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/how_to_make_look_like_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/11589495302.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/isaiah_43_commentary.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_off000080fa.bin
bed6373c3cefbdf3155de854e508fe15ad8cba0774475865bfa7e8b4dc6b3f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 5292 bytes
font_01_sfnt_off00009320.bin
b8dabfd3c27f69f46295ec8be914ba98596f7abf1612065a3abd953c4488dbfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9320 10140 bytes

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