Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b37e96597c8fbaf…

MALICIOUS

PDF

38.4 KB Created: 2020-08-02 21:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d7bcbcf2c543bdd34b67160126dc5ef SHA-1: 2c1e4394d239f8f4a0acfe23adf88ba5f1a298ca SHA-256: 7b37e96597c8fbaf974d76d559229486662332f747358b7a921d453ded29020d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and references "Mama's Family full episodes" to entice clicks. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO poisoning attempt.

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=mama+s+family+full+episodes
    • http://gurera.ricofarmbureau.org/uploads/1/3/1/6/131607712/bc2794876f3e.pdf
    • http://files.jaymcclellan.com/uploads/1/3/2/6/132683137/lenarusofujo.pdf
    • http://files.etotdelaware.net/uploads/1/3/0/7/130739769/zarofumefukivuz_zorad_biwapazax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/genodakininebebamito.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/press_sun_bulletin.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/levisamokidokakotok.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/jomowawisexuna.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/menexizanufoveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/14329504828.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/nasemudokupewu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3100/1238/files/jigudogijezurexeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/julipavosuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/cash_drawer_count_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/8463186220.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/fewowive.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/devix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/53229957639.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/wutasawijugebopasaditu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004956.bin
e302657d13a02dbdebd21f9c80b386e3a3101ebc027be45878182edefab8ece1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4956 4892 bytes
font_01_sfnt_off00005a0a.bin
538d3ee4cb858efe2f9d328cfed8596b8b0d28b5e58cf7f8d48bee550c112457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0A 9936 bytes
font_02_sfnt_off00007c3c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3C 4324 bytes

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