Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0304bdffb268598…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 15:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 016951feaffef549df3271af667965e8 SHA-1: b7823be01ad33d6ad08ba06b076bfa458ed64c3a SHA-256: a0304bdffb268598544d56c13c172b223eeed93d4d00f7bcad01ff56dddf9d86
150 Risk Score

Malware Insights

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

The PDF document exhibits malicious behavior through a high density of embedded links, with one specifically identified as a redirector to known malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body contained mostly binary data and URLs.

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/pify?keyword=artistry+youth+xtend+ultra+pdf
    • http://files.foralwaysjonghyun.com/uploads/1/3/1/6/131637352/kutazobov.pdf
    • http://files.lasttimetheywon.com/uploads/1/3/2/8/132815892/4929484.pdf
    • http://files.myemeraldplantation.org/uploads/1/3/0/7/130740011/7778825.pdf
    • http://files.parablecandlecompany.com/uploads/1/3/2/3/132303035/8539063.pdf
    • http://files.kissthefrog.ca/uploads/1/3/2/6/132682564/lupiruf-falikigu-dawej.pdf
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/81853131514.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/74693078163.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/mopigevanumara.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/dave_brubeck_time_out.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/45718749444.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/jspdf_autotable_angular_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/63718815867.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/32265883983.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/91328507853.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/89407176433.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/sri_rudram_namakam_chamakam_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/38647091474.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_off000062f4.bin
ff2154a80ef8f5b79960cc361e2918a890e91dadbcfeb4bf205b50d93492a0f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F4 5168 bytes
font_01_sfnt_off00007487.bin
48319c42b025040b38167930f22038fb4d25df7f6ec252e2765b21efceb76382
pdf-font-stream PDF embedded font (sfnt) at offset 0x7487 10968 bytes
font_02_sfnt_off00009905.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9905 4324 bytes