Malicious PDF — malware analysis report

Static analysis result for SHA-256 3043332a943343ea…

MALICIOUS

PDF

63.3 KB Created: 2020-08-30 09:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c74d788c9cc79737869124fadadf7c60 SHA-1: 3fb2d1a5fb7c4b608e99013e61502ccd9dc3906f SHA-256: 3043332a943343ea0b024ad05be88090bb2a57005fde92af70da8803a70000da
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=inconnu+%2525C3%2525A0+cette+adresse+personnages'. Additionally, another critical heuristic indicates a PDF link farm, with multiple links hosted on cdn.shopify.com, though most appear benign. The ML classifier strongly flags this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure the user to a harmful site.

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/wix?keyword=inconnu+%2525C3%2525A0+cette+adresse+personnages
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/63187372628.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/battleships_yamato_and_musashi_anatomy_of_the_ship.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/jidomazerajiporirip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/slipknot_vermillion_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/9978280212.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/nuwin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0142/files/kawovofizep.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/47584720085.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/43555583092.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/united_state_address_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/joxiliwakegejudopatuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/numabeganoxevof.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1125/files/xesidig.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/
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/battleships_yamato_and_mus

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b48c.bin
c8cec3039b90845d8e0fbccc30d78ed7cc909bee38f8760c42c2841eda76cda6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB48C 5380 bytes
font_01_sfnt_off0000c655.bin
1aa8762798a3a581a8e7c53f074e3c4f390d168de5783c5f835f9f3369100dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC655 12712 bytes

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