Malicious PDF — malware analysis report

Static analysis result for SHA-256 a705fc6913b21a25…

MALICIOUS

PDF

57.3 KB Created: 2020-08-30 00:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673ce43bd562e8ad0468aea29b56ee28 SHA-1: ed1893407cf9c2a70338247fd1bbbaa509b29b71 SHA-256: a705fc6913b21a2528e524282e488e8dd6f152e34d0f356dc9c7965cc67071fd
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. This redirector is designed to lure the user to click through to a malicious URL. The document body itself is heavily obfuscated, but the presence of the malicious link is the primary indicator of compromise. The file also contains a large number of links to external PDFs, suggesting a link farm or SEO poisoning attempt.

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.cc/wix?keyword=canny+a+computational+approach+to+edge+detection+pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/bokefubunomafajip.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/47901962044.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/xasumapawadavipanurixuka.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/libros_minimalismo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/pepurujog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/darewaramuvatanesit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0629/files/fipapegavebelop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/8890115040.pdf
    • https://static.usrfiles.com/ugd/8de238_951f8c6825e2479d83b6c709053a896b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8997aafa3f27494ab9722614bebfc825.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/musivevolarijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/72874103910.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/bulox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/russian_possessive_pronouns.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_off00008b0f.bin
c10f277f45e2ef8f24f6a43c982c1677bf688e245f6028fa142d0ddfa1ad33a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0F 5400 bytes
font_01_sfnt_off00009d46.bin
3d1d3ba84a2afaab1f25f880b3652d8d6dbc760fe5b6a693267adf6239d6f191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D46 10924 bytes
font_02_sfnt_off0000c25d.bin
6253ccacc4d4dfeb7429b5c14dbdb6803521db37d54e49c1fa40de31041d3b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC25D 16116 bytes

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