Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc5398686e9569e…

MALICIOUS

PDF

50.3 KB Created: 2020-08-17 14:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f75c908c2a18b5104a5e50a13c31b784 SHA-1: cb4c3eadd13e661b49c8dc4448d6a0f5d775d549 SHA-256: ddc5398686e9569e7c3a1855a5018fdbc8ec9c31f8b78ea154e6b70a89967f4d
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a ttraff.com domain, which is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to an 'Australian visitor visa form 1418' and the URL associated with this lure. The presence of a large number of external PDF links suggests a link farm used for SEO poisoning or to 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.com/pify?keyword=australian+visitor+visa+form+1418
    • http://files.annshafer.com/uploads/1/3/1/8/131856188/bawovijej.pdf
    • http://files.redtrustbushey.org/uploads/1/3/1/4/131437566/cf54ebf017f366.pdf
    • http://files.reganwalkerauthor.com/uploads/1/3/0/8/130814644/dobodef.pdf
    • http://vawobi.saritzahernandez.com/uploads/1/3/1/8/131856145/vogobigo-nusada.pdf
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/vojukejiwixelexakixudib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/16089231365.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/41865089776.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/86100132975.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/butozovegibutafumidapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/fejisusokafos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/wixulufopatemadoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/kikubekolisokibusad.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/24_hours_sunmi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/7901949626.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/amar_ujala_epaper_lucknow.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_off0000878c.bin
f6ec6a1f5253ec6a6555d4253d8a19dc61d156bbfe82da6845f045f3a1420061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878C 5296 bytes
font_01_sfnt_off00009982.bin
397c6ad30ff8b299da35a78cc000a7bc621e85a46779e9ed58b3285319e0ea7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9982 10076 bytes

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