Malicious PDF — malware analysis report

Static analysis result for SHA-256 262ecd48ca11b922…

MALICIOUS

PDF

48.1 KB Created: 2020-08-28 13:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac7f9176e1d690f0e1b9f07bcbeea2b SHA-1: b5bcc3bd6d8e4f9644f3d055614adb67a4f3834b SHA-256: 262ecd48ca11b9226fad113894547f171f7e281bd58735d87df758c4956a263d
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body also contains numerous links to PDFs hosted on Shopify, forming a link farm, with one of these links also appearing in the document body. This suggests a campaign to drive traffic to malicious infrastructure, potentially for malware distribution or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=300+blk+subsonic+load+data
    • http://files.poulstead.com/uploads/1/3/0/7/130740510/kizigeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/lekatogijemuxirulogizudov.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/riruzupemuvirefalerox.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6797/files/bsp_thread_chart_with_drill_size.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/nolutugirazawo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/95975902284.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/37960792500.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/92832437003.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_off00007023.bin
4efa26145b905dc26bad097e8124457c60163d6896a573761a15550cf6063e3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7023 5016 bytes
font_01_sfnt_off00008124.bin
7e2d0deb9cc3793b8e8f5f7502ed55412c5160cd226382f8be6fbe043ce448fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 10856 bytes
font_02_sfnt_off0000a62f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA62F 4324 bytes

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