Malicious PDF — malware analysis report

Static analysis result for SHA-256 2460bab326054f58…

MALICIOUS

PDF

50.3 KB Created: 2020-08-01 15:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee6de130d610826eb7245cb26bd7b3cd SHA-1: 0914587e004bb911ad8fa29d903448ce402457ef SHA-256: 2460bab326054f586a28f5f7a0d48449067df8a3987c8cbdc6ddbf4883998e5e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm hosted on Shopify, with a primary redirector to 'ttraff.ru'. This indicates a phishing or malicious redirection attempt. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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.ru/pify?keyword=php+array+filter
    • http://files.breathethroughthis.com/uploads/1/3/2/7/132712034/jumevibodiw_kemek_mudevatemoxu_tifexoxa.pdf
    • http://files.nature-recharge-botanicals.com/uploads/1/3/2/8/132815003/05a433a2ed29096.pdf
    • http://files.lorrainenilsonphotography.com/uploads/1/3/1/4/131453056/xipikelabew_kobisexekanen_pakesobipabugix.pdf
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.nzepiphytenetwork.org/uploads/1/3/1/4/131453455/2790285.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/592626504.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/12755253478.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/21513308039.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/80733708136.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/numaruforaritipeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/52498970302.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/36345634411.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/xijemopole.pdf
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/fulunerasodemivisukilas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/16802619490.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/fekunukexuvufu.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_off00006c7b.bin
e1ac7db5073780ae17e6d6d34a9205114a983e876c96da66f7cb465446cfa5c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7B 4912 bytes
font_01_sfnt_off00007d3a.bin
ea4272520b8ce9b9e0446fb1ca9ca57121ad46ab3f2866ef436d929d13771878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3A 13164 bytes
font_02_sfnt_off0000a772.bin
8e1ea2dbc10ce1e733df7fdea8c083e0faff811cf1aa2cb486553edc1a93aa04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA772 16128 bytes

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