Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e883b7a55ee225e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 00:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 030a2de387eea5896b81410d21b03a6f SHA-1: a38b751e699561cebddf568c8cda98ff0da62123 SHA-256: 4e883b7a55ee225e6cd0c2a09bdff4465cc1fc85c615c1785ac053b3c190384b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though partially corrupted, includes the URL and text related to psychological testing, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=types+of+validity+in+psychological+testing+pdf
    • http://tofitaze.lidetectingresource.com/uploads/1/3/1/6/131606490/416b76aad9.pdf
    • http://files.fountaincityfc.com/uploads/1/3/1/3/131398333/furojagoboxel_rosabafonowoni_rirod.pdf
    • http://files.amandathompsonphoto.com/uploads/1/3/0/7/130776745/7857499.pdf
    • http://files.bricecjones.com/uploads/1/3/2/8/132814146/nulabarakaxeriwu.pdf
    • http://pezilun.walkonuniversity.com/uploads/1/3/1/0/131070161/fubari.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/25816673587.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/how_to_understand_the_bible_better.pdf
    • https://cdn.shopify.com/s/files/1/0447/8078/1734/files/25914829810.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/xokonobibejemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/73838640413.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/english_to_bengali_converter.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/71250420974.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/84934864260.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/92495585449.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_off00005c78.bin
a3c92fa76f6ee1703ded3b4f11aa787d8f1007cae14de1ad4290c2743c51cb91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 5432 bytes
font_01_sfnt_off00006f01.bin
f6aeafb9fc9b863c77266f40a98400082bd7f4306be89505f8ff65bc1e1ccdcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 9936 bytes

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