Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b92ce3eeb371e5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-25 03:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05f0942464392c0ae019d9c504a544de SHA-1: 56bb3fa7b6244c3451b41bb498e163bb5a704f95 SHA-256: 75b92ce3eeb371e5883a7fd9ea66f55e19eb5420d97120343264c107d9128789
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though partially corrupted, contains text related to a "beating heart meme template" and the authoring application, suggesting a lure. The presence of numerous external PDF links further supports the SEO link farm attack pattern.

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=beating+heart+meme+template
    • http://files.nathanpbryant.com/uploads/1/3/1/0/131070362/5d65571937cefc.pdf
    • http://files.moniquebosshardcurby.com/uploads/1/3/0/8/130874276/8affbb90.pdf
    • http://files.servisarts.com/uploads/1/3/1/3/131382470/tanuwopusaxuzokito.pdf
    • http://files.blinkebeautybar.com/uploads/1/3/0/7/130739704/todezesotit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/71113267013.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/vcom_sis_portal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1442/1653/files/boy_scout_of_the_philippines_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/2835/7030/files/vs_code_formatting_html.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/videos_action_films.pdf
    • https://cdn.shopify.com/s/files/1/0434/2965/8790/files/61646306505.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/continuing_professional_development_record_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3716/files/53658085556.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/xigara.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/xazurexusagiwaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/header_and_footer_in_powerpoint_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/porolu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/65787914307.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/concerning_hobbits_sheet_music.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655e.bin
fdee8bc95cd89390b217fa353a8a0858e80bd23d2e4bec7e684f77834e0d38e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655E 5104 bytes
font_01_sfnt_off00007688.bin
d67844fc742e29c2b17f353155cddd1a82979363a25b2ac54fc61cfa9181c1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 10352 bytes
font_02_sfnt_off00009a2f.bin
149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2F 16036 bytes

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