Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e5309bd3723fae…

MALICIOUS

PDF

50.3 KB Created: 2020-07-24 15:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f144d547920abe11b2216b5ecbb179cc SHA-1: 8ad1600bd1ee0c4e1203bcf111a65435dd8a48ee SHA-256: 49e5309bd3723faefe68345d48ea9ec2eb93ce4396b3e6ccdf79efddd9b6c618
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for phishing and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.ru, which is known malicious infrastructure. The ML_NYX_PDF_MALICIOUS firing further supports the malicious classification. The document body, though heavily obfuscated, appears to contain keywords related to product manuals, likely as a lure.

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.ru/pify?keyword=butterball+indoor+electric+turkey+fryer+xl+manual
    • http://files.giftedchildrenla.org/uploads/1/3/1/3/131384679/segifilo-muzajilivijeb-wupemafijaton-fujisosof.pdf
    • http://files.carolinahandysmith.com/uploads/1/3/1/8/131871786/1267875.pdf
    • http://files.skintwalletsusa.com/uploads/1/3/0/9/130970009/4881129.pdf
    • http://files.stitchedwithcare.com/uploads/1/3/1/3/131383624/dowumi-wefudazebukop-wivavin-tajewowe.pdf
    • http://files.stitched
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/48895647788.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/kugesip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/16848070570.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/94903813594.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/57036577037.pdf
    • https://cdn.shopify.com/s/files/1/0437/1431/4405/files/wuselosulajeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/42938999659.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/sodulolabopifedox.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6552/files/49371106593.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/36360503066.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/14449181927.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/sivofagexavegiwax.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_off00008701.bin
fe2ebb257ac22ea6d4d2d892ef84a69a3ce78ebb054aa213fd4999f42d6426d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8701 5296 bytes
font_01_sfnt_off000098f8.bin
2d2df92631dc4764556ab1fa864c3c902e17aca46902f3de99f4c9fd29287462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F8 10164 bytes

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