Malicious PDF — malware analysis report

Static analysis result for SHA-256 f768acfd2cb7c8bb…

MALICIOUS

PDF

39.7 KB Created: 2020-08-03 00:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87234b3e401dec4e1408a15584b64054 SHA-1: 01030f98c0ad0a0a885a2f2882dc10f5fbb78336 SHA-256: f768acfd2cb7c8bba44224047159a98290a67049c4a067395c201f62350f6564
136 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text suggesting a 'dentrix tutorial pdf' lure, and the presence of a malicious redirector at 'https://ttraff.ru/pify?keyword=dentrix+tutorial+pdf' strongly suggests the intent is to lead the user to malicious content. The document also contains visual lures like 'Download Now' and mentions invoices, further supporting a social engineering attack pattern.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=dentrix+tutorial+pdf
    • http://files.sakonnetlighthouse.org/uploads/1/3/1/4/131455903/34ce3d2652.pdf
    • http://files.nailandbeauty.co.nz/uploads/1/3/0/7/130739542/jinupapuwax-xikitemanenazi-lukadesipo-setegizizufed.pdf
    • http://files.oschernandez.com/uploads/1/3/0/9/130969206/fatigupovig.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/90630145645.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/granblue_fantasy_reroll_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0725/files/51024745267.pdf
    • https://cdn.shopify.com/s/files/1/0435/9267/9582/files/35058569920.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/weight_watchers_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/sasagokotebim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/sodad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/semiposiponi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7170/0120/files/86020305612.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/26828698974.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/64588466410.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_off00005edd.bin
a3c5182c2c81786529d8973a3f97fdacaf1329142c8c31fcd243554cb8b6b908
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDD 4924 bytes
font_01_sfnt_off00006fb8.bin
9c9340ee07067160a8ec9c47f609ad203a0bca48383c4ef93a78dd66cfdb5c4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 10116 bytes