Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9f10e2b6d2c29e…

MALICIOUS

PDF

53.7 KB Created: 2020-08-06 08:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced2db93e48ae654ec7ff35d0ac53643 SHA-1: d21ee4c42ee589bdd6e813ddd80c3d6c2a539925 SHA-256: df9f10e2b6d2c29eabd40b9694580e95568eba29c6ff7d0ab86689f7c5c00d56
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an intent to redirect users to potentially harmful content.

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=annamayya+sankeerthanalu+in+telugu+pdf
    • http://files.motorqueuenaturalhoofcare.com/uploads/1/3/2/8/132815148/1303639.pdf
    • http://files.honouredquran.com/uploads/1/3/2/6/132696154/difafudonamibe.pdf
    • http://files.resortattractionsllc.com/uploads/1/3/1/6/131606984/9405938.pdf
    • http://files.makealltimetreasures.org/uploads/1/3/1/3/131384300/jovazuzupi-vejexatove-doduvozavopajon.pdf
    • http://files.sccuttingsolutions.com/uploads/1/3/1/3/131382134/8238554.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/vizifudokanaributejumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/71165292957.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/32651755767.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/biology_science_for_life_with_physiology_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/66043507089.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/asian_paints_texture.pdf
    • https://cdn.shopify.com/s/files/1/0432/2829/9427/files/dezunoferixewar.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/zisepixezugukefimomojedol.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4157/files/tamuvok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/trane_thermostat_wiring.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/best_islamic_books_in_urdu_download.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_off00008d7f.bin
7a757a24568597434ccb8f811cd5783e19cc52c085a5659a91b3b364336f118f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7F 5612 bytes
font_01_sfnt_off0000a07c.bin
cad7fce8a104c497e5971f5798bba2dd55af0f9f620c8cd6dea7e0eba546d642
pdf-font-stream PDF embedded font (sfnt) at offset 0xA07C 12900 bytes