Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b8e3ae4e3defa3…

MALICIOUS

PDF

44.9 KB Created: 2020-08-20 20:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa2535ed03f44fe64b000faefe08cde8 SHA-1: 0584115ee865bc6d0fe05f12b5824d3b5d802dc5 SHA-256: 42b8e3ae4e3defa372adb81c4f5def021ae90fceada071aa23f9e6b18e4f47a2
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service, 'ttraff.cc', which is likely used to obscure the final destination of the attack. Another critical heuristic indicates a link farm, with many links pointing to Shopify-hosted PDFs, suggesting a coordinated effort to distribute malicious content. The presence of these link farms and redirectors points towards a phishing or malware distribution campaign.

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=i+am+so+happy+images
    • http://pofadiva.jwhitneyart.com/uploads/1/3/0/7/130775565/2726583.pdf
    • http://gorubid.cumbresadventuretours.com/uploads/1/3/1/3/131379578/242699.pdf
    • http://files.stpetersaberdeen.com/uploads/1/3/1/4/131406610/xesamejan.pdf
    • http://files.isabellawtw.com/uploads/1/3/2/6/132681476/8278366.pdf
    • http://files.cullensailworks.com/uploads/1/3/2/6/132695432/ruzudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/fewedofafigurulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/35681048365.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/vlookup_hlookup_in_excel_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/walovuzuw.pdf
    • https://cdn.shopify.com/s/files/1/0447/0921/6409/files/dubafiwokogaxaromotobevu.pdf
    • https://cdn.shopify.com/s/files/1/0445/6975/5812/files/cycling_gps_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/80797604897.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/95003181947.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2220/files/30664535287.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/42151794716.pdf
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/nuguribagotusa.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_off00006430.bin
8185f83e0d741894e8d24408cd24b34790593dcb6a308da50293baa8aded0ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 4744 bytes
font_01_sfnt_off00007459.bin
a85ab3150ec284764dd52306dd0827a8a6d2ccccd1ae5f153c306d54c80d1437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7459 10380 bytes
font_02_sfnt_off000097a1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.