Malicious PDF — malware analysis report

Static analysis result for SHA-256 9040d419df1baec7…

MALICIOUS

PDF

67.7 KB Created: 2020-08-04 22:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23ea1b51736a6dfc8a650b963cb16a9c SHA-1: 5f9a6e21e7ca51db7a3e8378479c4b6874bdeeb0 SHA-256: 9040d419df1baec7af0e8d4e1073a0ed2bf4930dee032ed03a554b3b949634ea
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the URL that is also listed in the heuristics. The presence of numerous links to Shopify-hosted PDFs suggests a link farm or SEO poisoning attempt to increase visibility and lure victims. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=anemia+infantil+en+el+peru+pdf
    • http://files.hicksandsonsatl.com/uploads/1/3/2/6/132683147/3263605.pdf
    • http://files.ponokaiownerrentals.com/uploads/1/3/2/6/132682976/namej_jowitobedamin_kelupu_giwurukoga.pdf
    • http://files.re-ventum.com/uploads/1/3/1/1/131163538/868859.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6666/8694/files/35636995335.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0437/6910/2485/files/45596909315.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/2645350394.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/ley_de_bienes_nacionales_honduras.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/56123326915.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/88228139644.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/download_audio_from_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/59472393852.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/90528348003.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/ruwawomiwevusenewisoxur.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/2526601564.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c83e.bin
25c46ccdbcbefa24abfaa5ce44933e93ed2511313fec2699b6ce8ecd518c4bd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 4996 bytes
font_01_sfnt_off0000d925.bin
c6682cc29bebb61982e44f797f4a74b2dc6d93ec0a99eed9fec492752f1edd90
pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 11932 bytes