Malicious PDF — malware analysis report

Static analysis result for SHA-256 476ad309fa6eba0b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 22:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d363c1004dc3c509b5c952c6fb3fd8a2 SHA-1: 7af195e647cbce067d428c28cc0b988943d6447a SHA-256: 476ad309fa6eba0b2ada0be4545e7de1b4749c1e216a93b64ebbfe27516c4288
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, designed to obscure the ultimate destination. The primary malicious link, https://ttraff.com/pify?keyword=ozark+trail+wagon+manual, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to an 'Ozark trail wagon manual', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness.

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=ozark+trail+wagon+manual
    • http://jogagumek.skilledpaint.com/uploads/1/3/1/0/131070894/jidebuzizeva.pdf
    • http://sejow.paintmyfeeling.com/uploads/1/3/1/4/131483281/jiguj-lobudujusojuzi-senuboji.pdf
    • http://files.sgfaerialfitness.com/uploads/1/3/0/7/130776542/dujopa-gadaw-fiwoja-wesujizo.pdf
    • http://wigisugol.irelandforme.com/uploads/1/3/1/3/131378970/2508744.pdf
    • http://gosaluk.uwosororities.com/uploads/1/3/2/6/132695399/xekedoz-dibam-sanudarateka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/wisixumugaroku.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/vugotejugepu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/1616704443.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/cfop_rubik_s_cube.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/5810972770.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/talijofazejodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/sujugamiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/anesthesia_secrets_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/avr_assembly_language_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/autobiography_of_apj_abdul_kalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/christopher_hitchens_mortality.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_off00006ad5.bin
8d3d24e659b40eaa16cf23fe4bf159a3b241f847f735ff02fa455d035e53a0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD5 4824 bytes
font_01_sfnt_off00007b3b.bin
2244d161e69422dd3bc3a6e40fff7b0203ffe805218236c8d61af9b282e188cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 10292 bytes
font_02_sfnt_off00009e7a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7A 4324 bytes

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