Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b7379e9f390bc0…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 19:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f48baddc527835e12070a5f5ab3c7bf SHA-1: 1a29404a38b2e4bfe12faced74f776f338f156c4 SHA-256: 78b7379e9f390bc0f5b97fd18cea557578042598c562307aebe6a6ac56590e7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though corrupted, contains text related to pumps and the authoring application, suggesting a lure to disguise the malicious intent. The presence of a link farm heuristic further supports the idea that this PDF is used for SEO manipulation or to drive traffic to malicious sites.

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=centrifugal+and+axial+flow+pumps+pdf
    • http://files.brightbeginningseducare.com/uploads/1/3/1/3/131398419/muzafe-tajokodo-tujug.pdf
    • http://files.reliabletrust-translations.com/uploads/1/3/0/9/130969746/doxareguv.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • http://files.mypointmaps.com/uploads/1/3/1/0/131070294/166841.pdf
    • http://files.waveloopart.com/uploads/1/3/2/7/132740343/883d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/24380111813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9242/7430/files/63372941849.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/82187901386.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/rasebewozufiw.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/pig_latin_converter.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/dekifadebumat.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/82889609612.pdf
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/ni_kto_ne_znaet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/18406886395.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/34635507705.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/36565613285.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058a7.bin
cd3732df43d2f4a1bbc8e555be6a582e61d3aa8c53b4174d27c5356f8d19d01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A7 5428 bytes
font_01_sfnt_off00006b1f.bin
f906c5f220d5a9c3bc8260cc628a0450bb1282010f294c2c5b499fb2e21fbefb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1F 10068 bytes
font_02_sfnt_off00008dc3.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC3 16036 bytes

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