Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd612d98303917a7…

MALICIOUS

PDF

53.3 KB Created: 2020-08-11 13:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d701bbffcd7b96cd3f0ea1c2b92ab6cc SHA-1: 60aa3b400f0ed435264f7f11b53ed1c71b3bbb9f SHA-256: cd612d98303917a736a5ebd822e832f841d29c23cf31c81c4ece951f3e4dfa07
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains the same redirector URL and other PDF file URLs. This indicates a link farm or redirection scheme designed to lure users to malicious content, likely for phishing or malware delivery.

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=analytical+methods+for+polymer+characterization+pdf
    • http://taviwegew.bridgehousesarc.org/uploads/1/3/2/6/132680903/mugukig_nuzafinepuwiwo_beliwazodamak.pdf
    • http://files.rachelfelstein.com/uploads/1/3/0/8/130813366/7166970.pdf
    • http://files.faithforinternationalassistance.org/uploads/1/3/1/3/131398134/d536a9.pdf
    • http://files.judobooster.com/uploads/1/3/0/7/130738722/mukufoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/50240061927.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/10650241739.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/dunej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/57678327641.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/hotel_brand_standards.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6777/files/18769677942.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/legendary_pokemon_in_emerald.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/supatomaxexipefiwe.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/receipt_book_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/51226614453.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f60.bin
2f22ee2ce9e879cb7084e626c7feea3fec2c4e9ba56f44aeabcf082b2cc0900e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 5324 bytes
font_01_sfnt_off0000814d.bin
e76dfa891b268051ffa96f848b3af912234901a365c4b1ab5ef25b60660aeaaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 10008 bytes
font_02_sfnt_off0000a3d4.bin
89e8aafbe8ee2c7f3266b17cd39cf05f10435523f88472c7e1a1d2e3feddee8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D4 16192 bytes
font_03_sfnt_off0000b910.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB910 4324 bytes

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