Malicious PDF — malware analysis report

Static analysis result for SHA-256 e288bd981cb39148…

MALICIOUS

PDF

93.7 KB Created: 2020-08-10 19:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18fe048b004b5807fdc13c5965bf73b3 SHA-1: ff78135108fbde1f76e6d53a8fef3d5956879286 SHA-256: e288bd981cb3914880d57f023bf1102fdca668c36fb8c79d76603141210a3095
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to 'mathematical logic and boolean algebra pdf' and the URL itself, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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=mathematical+logic+and+boolean+algebra+pdf
    • http://pixokeg.cotwholesale.com/uploads/1/3/0/9/130969465/nakavu.pdf
    • http://vugan.rubenhg.com/uploads/1/3/0/8/130814328/gavon.pdf
    • http://menifif.goodearthvt.com/uploads/1/3/1/6/131606289/3354679.pdf
    • http://files.erichber.com/uploads/1/3/2/6/132682936/vukuvute_mukuzubovijaku_wiwura_rewavozanufoze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/52254558243.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/76915210082.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/binomio_de_newton_demostracion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/bofufe.pdf
    • https://cdn.shopify.com/s/files/1/0448/2105/3600/files/17191883379.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/taxogiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/jenenujexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/12149547146.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/kupatanamawegekeve.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/gekedasaparana.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/tennis_elbow_exercises_csp.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/kraken_priest_5e.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_off000111cc.bin
fe772caa19a556102650678704882a1fb3f1ce28cd599f41d1e8ea250ec5999b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111CC 5536 bytes
font_01_sfnt_off00012476.bin
bb361b7a6ada832cdd2d7fdc8f711248a6e718f93eaf379a5d3050125b9fb5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 14464 bytes
font_02_sfnt_off00015239.bin
4dd2916559f34819719cd61b2f872ce946149feef750b0e8dcda1bdbcc952dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15239 16560 bytes

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