Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ddcdcc07c85659…

MALICIOUS

PDF

59.6 KB Created: 2020-08-13 12:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 248d28e46e70f6f174905414f0b05fb9 SHA-1: ba9f8aeca57b6a78a7bae7d8e90bea1edd3effc4 SHA-256: a0ddcdcc07c8565940e394cb2eae2d0f842b08c1eec8f1dda7a7e4d415dd8eea
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, designed to appear as legitimate PDF downloads. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=qaseeda+ahmadiyya+pdf+download'. This suggests the document's primary purpose is to redirect users to malicious sites, 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.ru/pify?keyword=qaseeda+ahmadiyya+pdf+download
    • http://files.brendaknows.org/uploads/1/3/0/8/130813042/8621603.pdf
    • http://files.happysnapsstudio.com/uploads/1/3/2/6/132681647/vekoton_favobelunib.pdf
    • http://zabupu.roxanaramos.com/uploads/1/3/2/3/132303382/7115372.pdf
    • http://files.budapest-connection.com/uploads/1/3/0/8/130874469/tezadexesuma-xelufopawubap-bojupanirupiguf-nijigemilo.pdf
    • http://files.centraltauntonscoutgroup.com/uploads/1/3/1/4/131438437/6894772.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/gogotimetaxut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0439/0813/7128/files/bill_gates_autobiography_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7974/files/ansys_17_cfx_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0450/7539/8821/files/apprendre_l_anglais_facilement_et_rapidement.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/70329746611.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/77240457129.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/cad_soft_tools_dwg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/23485568417.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/90449968706.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/wijenuwenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/64498320374.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/23303627633.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
stream_006_off0000b11a.bin
d012f61a3ac9cede57397052e442880fca1aba07d45ff433aee7ebd74aca1ee7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB11A 27380 bytes
font_00_sfnt_off00007b92.bin
f0f5759df650f1151627d68ad543a4c1a29096e64c10909946183916d6c55a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B92 5440 bytes
font_01_sfnt_off00008e09.bin
13ec887b8c77ea9c59860df144f00d40f1833eaaaaab29ff34a261ca4d4809a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E09 10244 bytes

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