Malicious PDF — malware analysis report

Static analysis result for SHA-256 498cc81fabcd7cf1…

MALICIOUS

PDF

58.7 KB Created: 2020-08-06 02:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1dddf6fa182011bf02991eeb8cc0ebc SHA-1: 4fea827758b7651ea53ff718a46f5796418d075c SHA-256: 498cc81fabcd7cf13a157951f99b182231d7333fc3062b9315adb8aefdeb8955
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is disguised as an IELTS vocabulary list. This indicates a social engineering attempt to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=ielts+general+reading+vocabulary+list+pdf
    • http://files.magnoliawoodpool.com/uploads/1/3/0/7/130740375/wagak-teridiguguso-puboxesiguxipes.pdf
    • http://files.empowerednation.net/uploads/1/3/1/4/131453406/zuraripedigogenuxo.pdf
    • http://files.texascoastalexchange.org/uploads/1/3/1/8/131856435/c9b4c4d2b.pdf
    • http://sovezaf.onshortfinal.com/uploads/1/3/0/7/130739024/detujejuzidakamin.pdf
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/datisopebivodovukevolag.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/55105082879.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/james_patterson.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/titan_air_compressor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/defekasomulotelepoluw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/23077168291.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/14975488767.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/wevuzakonimiduzalu.pdf
    • https://cdn.shopify.com/s/files/1/0444/5034/9223/files/junkers_gas_calorimeter.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/dorifujox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/gakovomik.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_off00008377.bin
40434e50adf1559c07c054cdaee354c637494925b112b8720cfc7dbd31501638
pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 5564 bytes
font_01_sfnt_off00009672.bin
d814736dbc98560419e3b7148f703939c15a79d600ec909fe7aaa4b11b74bfef
pdf-font-stream PDF embedded font (sfnt) at offset 0x9672 6916 bytes
font_02_sfnt_off0000ae78.bin
b3881abd560486b65ee847ab342821f8bec36f819f2aea69b98411b5c1ac593d
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE78 15132 bytes