Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ba08e3f1777016…

MALICIOUS

PDF

47.2 KB Created: 2020-07-28 19:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2faa45d0c0f51cabb062515bf4e08211 SHA-1: 0617bd9f92c2fd5b2b884b983849300323256d6a SHA-256: 32ba08e3f1777016cf565e10e547b664a997b40f0c6601418faff68c8ace5d96
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains metadata suggesting it's a 'penetration testing report', a common lure for phishing or malware delivery.

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=penetration+testing+report+filetype+pdf
    • http://files.bluemountainsanimalrehabcentre.com/uploads/1/3/1/1/131163859/tusadomikesuvabomiwe.pdf
    • http://files.wildroseworkingbelgians.com/uploads/1/3/0/7/130775707/bavanutala-kezazonelizaxav-vapibebifu.pdf
    • http://files.leadlovelearn.com/uploads/1/3/1/6/131606789/dujakofopawimu_bodedosakuwo_jovaniwu_dovesofurulamo.pdf
    • http://files.bartlettyearbook.com/uploads/1/3/1/4/131482946/842436.pdf
    • http://files.leadlovelearn.com/uploads/1/3/1/6/131606789/dujakofopawimu_bod
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/wegijusip.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/8183661531.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/zukexuxukobufuwuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7913/1551/files/fetetotamomutawu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/35272653644.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/pabedofakivudesutime.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/wetanudev.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/64066096281.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/siripoxeretatokanasaxijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0742/files/7830852598.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/sunexulupalilunugaxov.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_off00007e4c.bin
55c8b3c30b8ac6b2d2ff4c0fc79ad34a3ed4239d740babe7db5ed691d2c7a026
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 5100 bytes
font_01_sfnt_off00008fb1.bin
8b74412fd85268957dac97e35e75be44584b61d70bd52f302223a25c979b7d51
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB1 9320 bytes