Malicious PDF — malware analysis report

Static analysis result for SHA-256 515aa70a12516667…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 05:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5d265958ec8175cd44a53f62f9191d2 SHA-1: 036e6e9ae9000880037d5afbb5526d24255bd4cf SHA-256: 515aa70a125166677b81979266d6421a9886628adde81cc9d4e59ab259bc8ffd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.com/pify?keyword=irinox+blast+chiller+pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=irinox+blast+chiller+pdf
    • http://gipakumit.lutateacher.org/uploads/1/3/1/1/131163635/3209999.pdf
    • http://files.buscolibrary.org/uploads/1/3/1/4/131438474/8237223.pdf
    • http://files.natalieberry.net/uploads/1/3/0/7/130775063/0426ee02a314.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/81810833280.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/rojugawepofiluzoxot.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/7128910296.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/42451254971.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/barreras_de_la_comunicacion_administrativa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/bundesliga_spielplan_2020_20_bersicht.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/50861512056.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/guwamutusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/54740536661.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/bottom_up_merge_sort.pdf
    • https://cdn.shopify.com/s/files/1/0431/5886/4028/files/42557915727.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/46005805007.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/8782536927.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_off000065c1.bin
4c6d87654370cfcf715d4ee6a432bdea2c8b3daeebcd7422b298860fab74c306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 5388 bytes
font_01_sfnt_off00007812.bin
3217e7c9148e0a2b8afe2696db86b057f44bd26fac4ecb7ca5c422787b8ae8c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7812 10724 bytes

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