Malicious PDF — malware analysis report

Static analysis result for SHA-256 609ad55cb41c2316…

MALICIOUS

PDF

50.0 KB Created: 2020-08-21 11:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424d9fed497865195e77162b46ed9234 SHA-1: 7f9fd384a78fd3291ea93a37e5c175565ba700fe SHA-256: 609ad55cb41c23166ca38ce96a7177677465bac61c4e9ae00a94e608650bd777
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a popular game, aiming to trick users into clicking it. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to distribute further payloads or engage in SEO abuse. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.cc/pify?keyword=blizzard+warcraft+3+classic
    • http://files.salonargio.com/uploads/1/3/1/4/131483148/kekemedotowix.pdf
    • http://xolupunux.jinsoobae.com/uploads/1/3/1/4/131438860/worisipo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/duvop.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/57080869150.pdf
    • https://cdn.shopify.com/s/files/1/0450/2568/9758/files/integrated_intel_graphic_media_accelerator_950_driver.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/8264192435.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/2002_saturn_sl1_repair_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/fupavurazomafomosizexaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/xulupokonovupozukux.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/mathematical_physics_book_by_boas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/pavakagaterawepom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/28641532612.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/76767156608.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/14362210264.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/gafunufirufogi.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_off00006452.bin
6fc6d33d5a75fc115d206267863b01b8c14195b2d3c2303fb97e5836909bcf44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 5372 bytes
font_01_sfnt_off000076b0.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B0 1800 bytes
font_02_sfnt_off00007f3d.bin
a230763e1c4e1b9811f1b980269d4988f3d55b2eeabebbdfce31c5b819dcf238		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3D 10796 bytes
font_03_sfnt_off0000a46a.bin
499437ff20864a62d33a166b413ee6b6f6b8312bc1707f9e8c0a602eede44796		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46A 16372 bytes

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