Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cec8b43cbb7ddc…

MALICIOUS

PDF

56.3 KB Created: 2020-07-30 22:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcf8ce33e4a48bb68c5b63138d21f96d SHA-1: 590124ee5676dfb11f5f49f23625f28bcaf2a556 SHA-256: 96cec8b43cbb7ddc232b550e5a6c17d6b500858b65e57281e61ce9c4d4b21fc1
152 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its inclusion of links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to 'industrial psychology articles pdf'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking or distribute malicious content. No scripts were extracted, but the primary malicious activity appears to be redirecting users to harmful sites.

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=industrial+psychology+articles+pdf
    • http://files.colourmydoodle.nz/uploads/1/3/1/4/131452838/2827838.pdf
    • http://files.redeagleranch.com/uploads/1/3/1/4/131437438/5254854.pdf
    • http://files.vaporservices.org/uploads/1/3/1/4/131437313/xonuwifariguxiz.pdf
    • http://files.literacyshedblog.com/uploads/1/3/0/8/130814749/gabomaluweweza.pdf
    • http://files.vaporservices.org/uploads/1/3/1/4/131437313/xonuw
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/gokiwiwadonigumoxipizurej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/nutexenisagogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5871/files/kuserajorimafuxif.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/fuxokojotolebefagosisatas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/rugok.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/tejumotilutodux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/rixisezawaverapajuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/65654685295.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/13254147413.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/823334182.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/fegaxilelotuturid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/35844489142.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/jetikoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/61674059030.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009dcd.bin
4390284c8666f0b47837827ad2c0d598595aa649989efa586d82513dfb4fe8c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCD 5340 bytes
font_01_sfnt_off0000afec.bin
f813967eecbfea5736f496c29a8decd7314aeb50c1b00a8372478dba3d7ece96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEC 10556 bytes

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