Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c8ce015f45a8e9…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 11:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0bbb13254d8e4e78f8f1f47ad52c1d SHA-1: 6cdf1a07bdf8dc9c4dabce7526d779d13847e5a7 SHA-256: e5c8ce015f45a8e9b3146d67f127819cad2c6f01e723be4da8d5509dae9d316c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented as a 'libro recetas dieta cetogenica pdf' (keto diet recipe book PDF), indicating a social engineering lure. The file also contains a PDF link farm heuristic, suggesting it's part of a larger SEO poisoning or link distribution scheme. The primary malicious IOC is the redirector URL.

Heuristics 3

  • 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.
  • 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=libro+recetas+dieta+cetogenica+pdf
    • http://files.themysticlivingschool.com/uploads/1/3/0/7/130739542/7970713.pdf
    • http://sevetipu.mountaingrovelutheranparish.com/uploads/1/3/0/8/130814758/fexenefoleba.pdf
    • http://files.anchorageonthestlucie.com/uploads/1/3/2/6/132682820/3820210.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/23959209197.pdf
    • https://cdn.shopify.com/s/files/1/0436/8026/8438/files/luxabujofajakemirex.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/82291216504.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/41984620226.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/xamosejapas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/whirlpool_duet_dryer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/sevawadatebimupom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/zudujafujulasilutisi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/add_and_subtract_mixed_numbers_with_like_denominators.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/98109170611.pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/57445504189.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/how_to_type_in_italics_on_discord.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_off000072fd.bin
0d7105b5efea251670c2994d2d834fe92a7aa844a57e3996e5cf4bf05c6cb4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 5372 bytes
font_01_sfnt_off00008551.bin
1cc8eb014dec380779601a96ff03fbd672416b71765e87f5e3769d4901a2ce06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8551 11444 bytes

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