Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bfffe9524ac0d0…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 17:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcdd3b25800e847617a16d8d1d0ea329 SHA-1: 2c90c28fd4b491101e070d3b373364cc6a89e0db SHA-256: b9bfffe9524ac0d067d421e504cbc33b787c55f909faf5410f1e9a4274811c58
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=org.+apache.+commons.+net+jar+free'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains the suspicious URL and text related to 'org.apache.commons.net jar free', suggesting a lure.

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=org.+apache.+commons.+net+jar+free
    • http://files.ypoceanside.com/uploads/1/3/1/8/131871642/fomegudaxozam_zinogevija_berum.pdf
    • http://files.debbieclaxton.co.uk/uploads/1/3/1/8/131856121/5346599.pdf
    • http://files.drterry4ny.com/uploads/1/3/1/1/131163540/8351741.pdf
    • http://farovu.youtrition.co.uk/uploads/1/3/2/6/132695584/dujatevomufapix_muwaji_fodebafate_lifufijufamif.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/43598220155.pdf
    • https://cdn.shopify.com/s/files/1/0447/8432/0661/files/76862691203.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/13245423330.pdf
    • https://cdn.shopify.com/s/files/1/0431/3822/0181/files/wideno.pdf
    • https://cdn.shopify.com/s/files/1/0434/4601/0022/files/78793875368.pdf
    • https://cdn.shopify.com/s/files/1/0435/9048/4131/files/66558063807.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8791/files/sosesunalimomof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58863311498.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/8998/files/29572038557.pdf
    • https://cdn.shopify.com/s/files/1/0450/6628/9302/files/28065777330.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/25502846241.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_off0000529a.bin
c335e26dc4f2602913d2f64fe49a11c10658c0b521d68d11fd928809265e067e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529A 5532 bytes
font_01_sfnt_off00006552.bin
45f19369255a45ce7a67531e1dd60a59e60151a7de596094df20c371330bfbfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 13804 bytes

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