Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9e1df9f1177d98…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 03:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec421bfc53331cd41f9be063a582e5a5 SHA-1: 0ace360bc725b4877ed076274ead5cbcebffddc2 SHA-256: ac9e1df9f1177d98c9658494e27a37fb0367aa344fa4e56a1073874556ebbcd4
130 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, which is characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector, 'ttraff.com', disguised as a 'how to download google chrome' lure. This suggests the document's primary purpose is to redirect users to malicious sites, potentially for malware distribution or phishing. No scripts were extracted, but the PDF structure and link farm heuristic strongly indicate a malicious redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+download+google+chrome
    • http://files.jowaholland.com/uploads/1/3/2/7/132710676/temedek.pdf
    • http://files.theunwindingway.org/uploads/1/3/1/3/131398369/rufagotap.pdf
    • http://files.detroitorff.org/uploads/1/3/1/4/131437924/mewoko-xegaxovutunel-suguvada.pdf
    • http://files.applebymagnaallotments.co.uk/uploads/1/3/1/3/131380390/5095129.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/amd_hd_audio_device_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/16299220844.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/introduction_to_psychology_14th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/til_tuesday_voices_carry_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/ps_i_love_you_jenny_han.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/81772424035.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/75998232566.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/32184372278.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/95462335453.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/rajeruf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/ruvubawobu.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_off000066f5.bin
87414733e3aea9863df7a4489f90c3a4c39f05ed14e10e501dee2a4ae4c27f5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 5228 bytes
font_01_sfnt_off000078a2.bin
2bb98574a18a92208588724c090a373767fc785df68d3dd7de982af966ca3770
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 10360 bytes