Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58af3f263989d02…

MALICIOUS

PDF

56.2 KB Created: 2020-08-02 03:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca2b1c2669a625df35a367efaa08b311 SHA-1: 30cea0700eac88f3bb5fddb1ad59ce7eff89178c SHA-256: d58af3f263989d02c581c084506770d5e275507c0e8caaf47b33923cf097c122
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=smashing+pumpkins+today+lyrics'. Additionally, it exhibits a PDF link farm behavior, with numerous links hosted on cdn.shopify.com, some of which are confirmed benign but others are unknown. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

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=smashing+pumpkins+today+lyrics
    • http://files.karenfornes.com/uploads/1/3/0/7/130739810/9718655.pdf
    • http://files.lennoxweb.com/uploads/1/3/0/7/130738911/difonim.pdf
    • http://files.jonnywilderness.com/uploads/1/3/1/4/131452804/gemeni_kexodipav_dejuwugazexi.pdf
    • http://files.nauticalmediagroup.com/uploads/1/3/1/4/131453260/jiziwo.pdf
    • http://files.sampevclt.org/uploads/1/3/1/3/131380440/mikaluges-rokixegedobuloj-leneg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/xarubalisajusobit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/5389971631.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/3699861135.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/popovitogesefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/65776682041.pdf
    • https://cdn.shopify.com/s/files/1/0437/3276/2785/files/65481865136.pdf
    • https://cdn.shopify.com/s/files/1/0432/1289/8461/files/20848715132.pdf
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/vabepazupuzinum.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/17655944159.pdf
    • https://cdn.shopify.com/s/files/1/0438/8811/5867/files/5098919398.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/vetevegasupukowigajijasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/72659539588.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_off0000866e.bin
d6cc3471968a0725769ead984910d9f409251eda8850aa7663a7045499c48343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866E 5756 bytes
font_01_sfnt_off000099e6.bin
19798b294abb27b1e86696c643aaf90e5cfc54aee8c1c03d424807a6b7aae0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E6 10524 bytes
font_02_sfnt_off0000be1a.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1A 16120 bytes

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