Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ffd3f442fbd8567…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 08:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f9b3d07f48c2def210c0531d6f9b22f SHA-1: c91bd47272baf2b911e99916529edfb23c2b5465 SHA-256: 1ffd3f442fbd8567116ea6586011d84dd38ed6520ac817f198edadd1ae94b7d6
120 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.cc/pify?keyword=osrs+fossil+island+quest+guide'. This URL is embedded within the document body, suggesting a social engineering lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. No scripts were extracted, and the document body is heavily obfuscated, but the primary attack vector appears to be directing users to malicious external content.

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=osrs+fossil+island+quest+guide
    • http://wumum.witnessestointernment.org/uploads/1/3/0/7/130738721/fbbad4fe363.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/15461348147.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/zosolaxizaxefomatojuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/xoruvivavuxozufidubes.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/75885563808.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/24316929590.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/mugifovumapesoriloni.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/labour_law_reporter_subscription_2018.pdf
    • https://cdn.shopify.com/s/files/1/0450/6884/5208/files/achievers_b1_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/4416445400.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/57354668403.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/topafunabirazedamimox.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_off0000592f.bin
6139266441926862ef12ad29b0f54a64ba6b89574aa005a67ebb210e580105a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592F 5108 bytes
font_01_sfnt_off00006a8f.bin
d9d044b8d1fa25fd51a7900ed390c72dff691a8d0395e3c698ca94b527023c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8F 10036 bytes
font_02_sfnt_off00008ceb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEB 4324 bytes

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