Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa4af25fae96a0b…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 07:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9e601eb930b72fd3d16883c284ea5f SHA-1: 37ad656b52682d17925e0557ca341687737316dc SHA-256: eaa4af25fae96a0b2d3b9958166952898e4b30211df1bf8384b77945796633ae
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector. The document body contains garbled text and embedded URLs, further supporting the malicious nature of the file.

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.cc/wb?keyword=assembling%20and%20disassembling%20of%20cpu%20pdf
    • http://wusexok.durantroadpetresort.com/uploads/1/3/2/6/132681231/2058883.pdf
    • http://files.annetterouleau.com/uploads/1/3/0/8/130874633/mozejeruwajez-wuful.pdf
    • http://files.mazeofevergreen.com/uploads/1/3/2/6/132696155/raneweti.pdf
    • http://diposut.plainsedgechiropractic.com/uploads/1/3/1/4/131409090/9597736.pdf
    • http://rigiz.rachelcobbsoprano.com/uploads/1/3/0/7/130740522/6749ebe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/fiddlehead_fern_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/fajawogogijubedage.pdf
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/pilivewoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5281/files/st_lucie_school_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/85351818071.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/beginner_vocabulary_esl.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/hack_snapchat_password_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/lalamikebajibokukusirusij.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/japasimojulabukajaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/jozap.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_off00007366.bin
8e7b6d80a42a7a0e2284a4316ab21fcb82a9b26acce0da215ede2d1508b57d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7366 5508 bytes
font_01_sfnt_off00008604.bin
d89c6fd30c9891fed65306805166daeb682ac70592e3d705fc279c1f1c325466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8604 10112 bytes

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