Malicious PDF — malware analysis report

Static analysis result for SHA-256 2079b07a29d8b28c…

MALICIOUS

PDF

46.0 KB Created: 2020-08-23 03:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb66de2c2982c3870564d08b58202b13 SHA-1: 4941b945399ba85f1637e5c0288e68b44b48e9b8 SHA-256: 2079b07a29d8b28c0f651a65b4c308456ce2c61a433837123e536d0bc719a6d0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=audio+converter+windows+xp+free', is presented as a download button, attempting to trick the user into clicking it. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning effort to distribute malicious content. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.cc/pify?keyword=audio+converter+windows+xp+free
    • http://files.kyleworshammd.com/uploads/1/3/2/3/132303310/1216988.pdf
    • http://files.torone-project.com/uploads/1/3/1/8/131872104/jeviwufopulejemekalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/89452550406.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/ficha_tecnica_aceros_arequipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/62889257697.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/chimborazo_climbing_guides.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/tuwezepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/zedanegaleximesomifup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/248138192.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/astrology_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/zisasefosop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/christmas_music_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/free_ford_windstar_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/probability_sample_questions_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/gamagulidif.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_off00006969.bin
a51b6f37865f6fe45812e0005787aca57b62c5d3c309d6e5137c2881ba9aab5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 5000 bytes
font_01_sfnt_off00007a8b.bin
b998c988f92fc1b2c513bdc9a1e273ce7d4499ce9b79897b4b7af1ba7e9cb527
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8B 10016 bytes
font_02_sfnt_off00009ce6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE6 4324 bytes