Malicious PDF — malware analysis report

Static analysis result for SHA-256 31625db28d5561ae…

MALICIOUS

PDF

42.8 KB Created: 2020-08-13 04:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29cd72effff643be7a60b182999e28f2 SHA-1: da3d4c6e1210cc8681ecd83583ff2146b3a47ab0 SHA-256: 31625db28d5561ae8e753255feeb9f318b9675a0af4e19f4234f079d8cd3ffce
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially garbled, includes the same malicious URL and a seemingly technical phrase, suggesting a lure. The presence of numerous external links, including the malicious one, indicates an attempt to redirect the user to potentially harmful content. No scripts were extracted from this sample.

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/wb?keyword=you%20are%20ventilating%20a%20patient%20manually
    • http://zinix.smokywaxcompany.com/uploads/1/3/1/3/131383309/854e010.pdf
    • http://files.tmsapvo.com/uploads/1/3/1/3/131378950/pivojetexekigon.pdf
    • http://files.motionfuels-arkansas.com/uploads/1/3/1/3/131380773/mugupebenigataz_jigari_lagiv.pdf
    • http://wigavo.twogates.ca/uploads/1/3/1/4/131453150/lovuwezuwusapejogof.pdf
    • http://files.lithgowagedcareltd.com/uploads/1/3/0/7/130776033/nawag-xalaxixavixilas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/bubbler_irrigation.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/vusasemojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5573/4167/files/nimuwezevaperinitevemuv.pdf
    • https://cdn.shopify.com/s/files/1/0439/9408/7582/files/autocad_electrical_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/jumamulol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/91007397094.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/bitudovarikabaronepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/psychological_distress_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/8757/6740/files/arabian_nights_book_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/29519132692.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/wusonexijajisanotup.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_off00006a3d.bin
549f6dca9ae504f38fa5fd0c1d2b5e27d682035c55e22fba0b8c6247015e5cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3D 5084 bytes
font_01_sfnt_off00007b87.bin
87029c9426b92a4d18f039e047fbce514a7691609e4b5929ba4659a73e8e8c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B87 10028 bytes

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