Malicious PDF — malware analysis report

Static analysis result for SHA-256 9254eb6b45d81d42…

MALICIOUS

PDF

43.1 KB Created: 2020-08-07 21:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1892fffc6ee812d1508c1a6aa2ab281 SHA-1: 4dd3d459c64365b4f19953a3430e3d1e636f2170 SHA-256: 9254eb6b45d81d426212b5aba72ca1ee6f9c9ba2ff31a2e0e641818e5141ac16
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=automatic+lawn+mower+pdf'. This URL is likely part of a phishing or scam campaign, attempting to lure victims with a seemingly relevant topic. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. 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=automatic+lawn+mower+pdf
    • http://files.brittanyleal.blog/uploads/1/3/1/3/131380848/zavidunema-fibujupe-jevulur-sepusibodidedum.pdf
    • http://files.mrsventurasclass.com/uploads/1/3/0/8/130814252/tivep.pdf
    • http://files.spirit7moves.com/uploads/1/3/0/8/130813616/9528302.pdf
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/18868434004.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/business_english_communication_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/desekuzufenolorizubijur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/majutosufamugiwinedeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/sunikosoxazajisanaxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/72702744048.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/3110351960.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/invertebrate_zoology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/normality_test_skewness_and_kurtosis.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/zokesebagojigimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/wafaguxamofarodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/rerutej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/negative_creep_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/86005630129.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_off00006a27.bin
b9880c9d461c173749c841635518e8c3c87444605a4aa183be85afa2c2825453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 5204 bytes
font_01_sfnt_off00007bd5.bin
300a21c46fe526bd4496325073d939e55195f1ba891729a169e5887b0f1ad609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD5 10276 bytes

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