Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3d65d24fac63b2…

MALICIOUS

PDF

37.6 KB Created: 2020-07-28 15:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b05b6bd0816b0542d2a98254b566c272 SHA-1: 82cff104b52b67730ddfbc516c19293fb1fab067 SHA-256: 4a3d65d24fac63b2569df26d4eb0e5e593a3b4bd22abc08ef9142f51ba429c54
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One prominent link redirects to 'ttraff.ru', a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a 'car racing game 3d uptodown'. The combination of a link farm and a malicious redirector strongly suggests a phishing or malware distribution 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.ru/pify?keyword=car+racing+game+3d++uptodown
    • http://files.tobarmhuirecrossgar.com/uploads/1/3/1/6/131606668/4869085.pdf
    • http://files.lottglobal.com/uploads/1/3/1/3/131380043/vakotab-koteluta.pdf
    • http://files.sutherlandbeatson.com/uploads/1/3/1/3/131384024/ef3a198fc3591df.pdf
    • http://files.localzak.com/uploads/1/3/1/4/131437454/medepigilipi.pdf
    • http://files.dietrichleisimages.com/uploads/1/3/1/4/131406841/60acfe27.pdf
    • http://files.sutherlandbeatson.com/uploads/1/3/1/3/131384024/ef3a198fc3591df
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tujekozovazufurujujazer.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/pulunidabur.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/xagakudukapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/65913943206.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/gemeliworawelizub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/sobazonumafarewaxagul.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/56557294857.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/demexakuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/78936637099.pdf
    • https://cdn.shopify.com/s/files/1/0429/9420/4825/files/kilopaketivesoxut.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/gapususotogezama.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/wisorefadawukawixadimij.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/81350548207.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_off00005800.bin
00fddf20d82536cb152340529c23e35ef04b5930e5cb665fe0f7bc8c748f4ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5800 5344 bytes
font_01_sfnt_off00006a22.bin
3091256382f13bf9f3487dd1c8a3883ff4b1192a1a63a33a1efda0ff6be154c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 9168 bytes