Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a718494964432ba…

MALICIOUS

PDF

47.9 KB Created: 2020-08-09 00:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86d5ef7d9f0dce0c83c269ce66a2b20b SHA-1: 177c42f8acfe2c04a034bfc971befc9a2a818739 SHA-256: 3a718494964432ba7911f1d37418d6b02f2c66620d89c8cbeac0d9b7ac328535
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=my+best+self+pdf'. Additionally, it exhibits characteristics of a PDF link farm, hosting numerous external PDF links, many of which are hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious infrastructure.

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.com/pify?keyword=my+best+self+pdf
    • http://bisijabar.bowenworknh.com/uploads/1/3/1/3/131384169/lukim.pdf
    • http://venelimo.adorablediamonds.nl/uploads/1/3/2/3/132303382/9eed67.pdf
    • http://files.oshkoshconcreteinc.com/uploads/1/3/1/1/131164351/rasizir.pdf
    • http://files.mylocalcbdstores.com/uploads/1/3/1/1/131163635/zigika.pdf
    • http://files.lehighvalleycorporatecleaners.com/uploads/1/3/0/7/130775506/4e7a78aa35ae1c.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/fiditalurav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/graphing_slope_intercept_form_practice.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/ccna_voice_instructor_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/kamosuxogibikudefor.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/lilopifetamijufi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/96905389808.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/94571196303.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/75525374572.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/xosuwamiwelikelofidowo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/repijefigita.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_off00007f93.bin
9ffbcd42a73914913583d8d346912ad4e44ec53861f32a9e62f8fe8841a3eb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F93 4976 bytes
font_01_sfnt_off000090a6.bin
9a57b709d9300fa05bf78e33c0fa76c6b4f3ef277c5223aa716a07daeaed7f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A6 10052 bytes

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