Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9f7aed89daab53…

MALICIOUS

PDF

37.2 KB Created: 2020-08-01 14:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9e5bf8416a12c7957ec0d4ae4c0f968 SHA-1: a8c23d0bd6a36bc31ec6b08a258d5785b4fcc97e SHA-256: ab9f7aed89daab53967f22cf2ff42e0c9d28827109434054a73606e9eea2ce2c
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=foo+fighters+wheels', which is a known malicious redirector. The presence of numerous links, many pointing to Shopify domains, suggests a link farm designed to obscure the ultimate destination and potentially host malicious content or phishing pages.

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=foo+fighters+wheels
    • http://files.banerjeesharmistha.com/uploads/1/3/1/4/131408537/362053.pdf
    • http://files.dbssstingsoccer.com/uploads/1/3/2/6/132695455/tevezukelorovog.pdf
    • http://files.thefireflymystic.com/uploads/1/3/0/7/130775009/3439985.pdf
    • http://files.cchsadventure.com/uploads/1/3/1/4/131411762/fozum.pdf
    • http://files.songarchiveproject.com/uploads/1/3/0/7/130740221/mutowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/42406443744.pdf
    • https://cdn.shopify.com/s/files/1/0428/7057/1174/files/18230674656.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/49660322598.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/2007_yamaha_rhino_660_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/78182602775.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/38379139049.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/download_java_jdk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/tamutedizoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2139/3320/files/dofedabuteboz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/xefomavarabikuva.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/27009496272.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/12958759577.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/58115176818.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_off00005551.bin
b32d59455431a6f842c7ecd4b1e38288a655f4023abc07d55044e37e01944ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5551 4864 bytes
font_01_sfnt_off000065f2.bin
045a2964ae5ee97dcfb5b43f6a33f74fca8075ab8e47d75efb9ddf3028933baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 9924 bytes

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