Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed34c9c66e5ef63a…

MALICIOUS

PDF

46.9 KB Created: 2020-08-02 23:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d0563fc5d071300397bda08a098026 SHA-1: a57bf3fd201605222e8ae6394b5ac4614d101c15 SHA-256: ed34c9c66e5ef63a5e126713ec11261b6f3df0bc7134201b8f227cf9da0a2ffa
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure to export a reading list. The presence of numerous links to Shopify-hosted PDFs, some flagged as benign and others unknown, suggests a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=export+safari+reading+list
    • http://files.mariaapostolopoulou.com/uploads/1/3/1/6/131636689/dcfbd562f6a.pdf
    • http://files.joyfullifehealing.com/uploads/1/3/0/9/130969917/2282238.pdf
    • http://files.newlifebaptisthp.com/uploads/1/3/1/0/131070291/3970313.pdf
    • http://kusokipo.bulldogsoflongisland.com/uploads/1/3/0/7/130776158/fobufob.pdf
    • http://files.therubythroat.com/uploads/1/3/1/4/131437889/negumola_xugigabuj_labube.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/xoritilenajive.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/38646691854.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/nageletanagatonav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/7983557994.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/58055646743.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/karat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0129/0650/files/kufadugomozofofa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/81752220795.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/posemamusowowuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/lowes_philips_hwy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/julelajewapesekazujowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/26680131733.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/bowasu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef5.bin
59e1a977b11dd91c1bc3f906d0dcd686800c4e20fa0b0522f3fc0550ee6ed823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 5232 bytes
font_01_sfnt_off000080d3.bin
49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 2140 bytes
font_02_sfnt_off00008aad.bin
5a9ca04fce1202edec14037fc50d041e5ee650dd853f37b303c71804d7b2b7ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 10420 bytes

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