Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b9ecb75e7a9e29…

MALICIOUS

PDF

121.7 KB Created: 2020-08-12 00:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24b1959cdbc066026288468cc6ba6ee7 SHA-1: e8d5e84be962c4ae4b16dfba802f2b700c37632c SHA-256: 13b9ecb75e7a9e296bc6fe775a0a987b1d6b1e7c3b41f478411175a574c12aa7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=behavioral+genetics+knopik+pdf', is flagged as malicious. The document's structure and the high number of external links suggest an attempt to drive traffic to potentially harmful websites, likely for phishing or malware distribution.

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/pify?keyword=behavioral+genetics+knopik+pdf
    • http://files.benchmarkmasonryinc.com/uploads/1/3/0/8/130813710/rebimi-xejedegu-lipobitemis.pdf
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdf
    • http://xupareti.gowanuswines.com/uploads/1/3/1/4/131453540/sufazesoge_dufemujemesares.pdf
    • http://files.ayusayurvedayoga.com/uploads/1/3/1/3/131380901/2653755.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/medoxuvimagadedonalijak.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/vanapaporemopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/46937539018.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/15799687679.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/zamojajuzitejid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/gastroesophageal_reflux_disease_diet.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/dipipowizadaleket.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/agatha_christie.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/61843885985.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/gegujegaguzizojev.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/rujumaruxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/36096916093.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/positive_affirmations_for_success_and_wealth.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e8d.bin
29b7b2b96ee9dc50f5d4dc8cb21aa195e7a20b37e9a2ffbb58f99829a68c7d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E8D 5592 bytes
font_01_sfnt_off0001b19a.bin
289c594187cb3c2f202ac675e3f00c0bf1843e4531595f303d5ca12e925ed1cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19A 12436 bytes

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