Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d12939c89574f06…

MALICIOUS

PDF

52.1 KB Created: 2020-08-04 10:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434d1b3afb8881c503d808d29de30cfc SHA-1: 0d3584b723ed931f3d1daf45b75e6b1abc9d77c5 SHA-256: 0d12939c89574f069d2ef09386f51179b7453b3f935c57cc6a01c3c1762edca5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests a tactic to manipulate search engine results or to phish users by presenting a seemingly legitimate PDF download that redirects to harmful content.

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=fi+dilal+al+quran+arabic+pdf+download
    • http://files.massyouthleadership.org/uploads/1/3/0/7/130738622/venonil.pdf
    • http://files.westvirginiaballroom.com/uploads/1/3/1/4/131406068/bogalibaxi_metede_miranunogonij_bigelatome.pdf
    • http://files.srcassociates.org/uploads/1/3/2/3/132303035/zivasufoduja.pdf
    • http://files.judeco.net/uploads/1/3/0/7/130740033/tojofefikupufum-javamara-lawaz-ruvanaruni.pdf
    • http://files.shaneleonardmusic.com/uploads/1/3/2/6/132695694/1913572.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/42838877190.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/94099752452.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bumagigefabap.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/33794503608.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/kaplan_gmat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/bajexipefapefinamow.pdf
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/73111977046.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/kurezirotetisaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/voroxikusotobebaxez.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/lambda_function_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/88457978498.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7450/files/husqvarna_rz5424_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/38884848647.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a8c9.bin
5e20813d65e9f4012463bf9f749b0b07cfc728ee5f2302c7fe13fc6f620920b0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA8C9 17368 bytes
font_00_sfnt_off0000724d.bin
ace0c97d037c0f9ef6310c05f9d093f599e2c6d4e8f951f74c68da3a5da6c34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724D 5284 bytes
font_01_sfnt_off00008463.bin
2434894f230685bcb723471a48850c8d3325e2d3a83c2a98cbf00f01cfd223de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8463 10840 bytes

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