Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f880939dcf3a735…

MALICIOUS

PDF

103.4 KB Created: 2020-08-01 22:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a8b377525f67347a857a9e8aef7bae SHA-1: 4a87939832d85dd80ffc5f4f7e04a277aece7e1e SHA-256: 5f880939dcf3a7353ef672dc41432a6dd0d9cc5a9be5b9ed1a4b58d87365c600
194 Risk Score

Malware Insights

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

The PDF contains a lure instructing the user to 'copy file' and paste content, which is a common tactic to bypass security controls and execute commands. The embedded URL 'https://ttraff.com/pify?keyword=c+copy+file' is flagged as a malicious redirector, suggesting it leads to a malicious payload. The document also contains a large number of external PDF links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=c+copy+file
    • http://files.veerahiranandani.com/uploads/1/3/1/3/131398547/xerutosifob_fogaguzawow_varixefuluzo.pdf
    • http://files.countertruth.com/uploads/1/3/2/7/132740458/xefudokavisam-fofanovalobin-borinidiposix-jojovigez.pdf
    • http://files.potluckcornwall.co.uk/uploads/1/3/0/7/130738614/redobovupane_jinefojulo_dikufiwiwasimop.pdf
    • http://files.acail.org/uploads/1/3/1/4/131437194/jawemir-jenijikeduvexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/kugobom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/tolaxiwukenijugufodiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/79103442895.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/80174332014.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/881810216.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1193/files/9936813365.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/18475987626.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/38769441077.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/ultimate_boot_cd_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/37312001543.pdf
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/loxekedukunapagujux.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012793.bin
19a4b43bf9d4f6f3afbae9c2e9f718b1915e26b61857aca05b2e7d44d09cbfe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12793 4252 bytes
font_01_sfnt_off00013616.bin
ffdcd74d9198c3904a7b8b60a96ed193d77a778edd7ddab2329fd9807e13dc0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13616 17636 bytes
font_02_sfnt_off00016cdb.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CDB 16312 bytes
font_03_sfnt_off00018267.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18267 4324 bytes

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