Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e66468543acb4aa…

MALICIOUS

PDF

33.5 KB Created: 2020-08-24 05:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d3a53f574d47493e3275733157494e SHA-1: 74b5809a1da5f4fc66fc07d685e09e2fd07a90ff SHA-256: 7e66468543acb4aa304499dd93efffd53d625114b62150dfd95d10d190501705
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=you+are+my+sunshine+sheet+music+guitar'. This, combined with a PDF link farm heuristic, indicates a likely attempt to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same suspicious URL and references to sheet music, reinforcing the 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.cc/pify?keyword=you+are+my+sunshine+sheet+music+guitar
    • http://dopesaxoz.galleryatno6.co.uk/uploads/1/3/1/6/131606289/7225962.pdf
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdf
    • http://wadixi.premierpoolnaples.com/uploads/1/3/1/4/131453177/pidudafuz-nasiji-gijus-laxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/jejenekut.pdf
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/mutibisunax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/55815826081.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/20668665868.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/xodovajekumasoneke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/golam.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/atal_pension_yojana_details_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/nomevetoputekavusovafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/texte_des_accords_d_evian.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_off000045fb.bin
2f0834735194dac5970be9b2536b0af08b3bff9940e6930a1e0216a5ebd6551b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45FB 5244 bytes
font_01_sfnt_off000057ae.bin
93af65663df371e8ed7b4a1465203e17613be45c04ea3295b6b0848a02eb0d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AE 9780 bytes

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