Malicious PDF — malware analysis report

Static analysis result for SHA-256 db52685023cea72a…

MALICIOUS

PDF

58.6 KB Created: 2020-08-30 09:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07c035718f59f087de6ccd9651018cd6 SHA-1: e695e31d47054027abecce6c9414840a3e7419c4 SHA-256: db52685023cea72a5f07b48c43b7f68aac598afc38a3a5cb498cc225209c42c7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links points to a known malicious redirector (ttraff.ru), indicating a likely attempt to lure the user to a harmful site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of a large number of external links also suggests a link farm or SEO poisoning tactic.

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.ru/wix?keyword=fei+long+street+fighter+5
    • https://cdn.shopify.com/s/files/1/0440/2721/6037/files/1249623828.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/tutikekuvifigut.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/javapanosanoseloma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/70533215316.pdf
    • https://static.usrfiles.com/ugd/b8c837_41ac5ccd51e14f04a62e0b6039b684e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b3437ac93af4eedb579bd23c38eb787.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2417/files/18611865576.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/53612339252.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/sofogaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_45596a660d2d478ab33f6b427a3f0e8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d49e5c5caf9482085299ed73482cb7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8012811e613d4442b9bae7f5fa8b8c84.pdf
    • https://static.usrfiles.com/ugd/538d67_cdbcead0aa6c4940963892d26772d0ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_11de0c5dc2014f0196e3ad40bd25b310.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cba.bin
399b966e33c20ede0db18c9e7d7c98e1679ef10dc7085cdae2dab582510ab947
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBA 8436 bytes
font_01_sfnt_off0000a91d.bin
453013af7594296861410657129b867b57f007a6e9d1f226915c47178d7f94da
pdf-font-stream PDF embedded font (sfnt) at offset 0xA91D 4896 bytes
font_02_sfnt_off0000b9d1.bin
e584b3d94c6ae47980cf9566dc6ca6f2cabae4afdc8bdc08fcce1a19f182caa9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D1 10324 bytes