Malicious PDF — malware analysis report

Static analysis result for SHA-256 2438966b0233e625…

MALICIOUS

PDF

41.3 KB Created: 2020-08-12 01:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d099ee1d8608dfa3e8536265ca435739 SHA-1: 0b1ea088d2f02c1c9f906da6d314686935ce46a8 SHA-256: 2438966b0233e625dda41eb4fd7bf0e5e06f5733d3781db5a05830137d6e2774
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'ttraff.cc', indicating a redirection to malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further supports this by identifying a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=online+boutique+business+plan+pdf
    • http://gifedo.ruthbeachink.com/uploads/1/3/1/0/131070420/62fbea4.pdf
    • http://digudej.ourgenerationsactivists.org/uploads/1/3/2/6/132695569/6139669.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • http://files.historyunderground.us/uploads/1/3/1/3/131398000/bedufujarum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/rusodanaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/14625938543.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/25115588407.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/watatizilunexokowemerabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/linabudaxepowigivalapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/wepifuganuxij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/vurerujojisuzexawanegam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/meminamewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4463/4773/files/livuzixufikife.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/76733639466.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/94403011242.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/bileroxezo.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_off00006420.bin
41df47e93165a3bbcf17eaf6eb68533a97c225f27f9240061a51b6d6f5ab23df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6420 5232 bytes
font_01_sfnt_off000075fb.bin
2ab1eeb4d405dc1d945ecd576f0627f7d576da8f9a90df4e206dc4abf075da5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FB 10080 bytes

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