Malicious PDF — malware analysis report

Static analysis result for SHA-256 510d7ee9b60972ac…

MALICIOUS

PDF

45.8 KB Created: 2020-07-21 04:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de35a26d8d0c4470550f0dd1d07d25f4 SHA-1: 5e3935c8a82c874dca6fef6a475fca4f8680c029 SHA-256: 510d7ee9b60972ac1185b2b2279baca49882a6eb7d980f0a102b0dd925154a10
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to redirect users to malicious infrastructure. The primary redirector URL is ttraff.ru, which is flagged as malicious. The document body is heavily obfuscated and appears to be generated content, likely intended to mask the malicious links and SEO-spamming activity.

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/wb?keyword=alan%20turing%20notebook%20pdf
    • http://files.medspabeautyescape.com/uploads/1/3/1/8/131856883/bugabugafuk.pdf
    • http://files.theswiftreview.com/uploads/1/3/2/8/132814826/647255df788c.pdf
    • http://files.blissfulbeautopia.com/uploads/1/3/1/4/131437924/f4172fec3.pdf
    • http://files.crookstonhouse.com/uploads/1/3/1/0/131070207/mirok.pdf
    • http://files.robohounds.com/uploads/1/3/1/3/131398010/3995175.pdf
    • http://files.crook
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/24794245867.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9659/files/jorezituto.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/67064002087.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/xadatudaxanuxexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/letofanal.pdf
    • https://konoxadejuk.files.wordpress.com/2020/07/56356827889.pdf
    • https://bijufexabez.files.wordpress.com/2020/07/muzuta.pdf
    • https://fizosiximog.files.wordpress.com/2020/06/ditojijimatowogalijizid.pdf
    • https://pezukiniv.files.wordpress.com/2020/07/80425538251.pdf
    • https://nonegek.files.wordpress.com/2020/07/fulelebojijezaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/40736026525.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/53614346472.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/12470119395.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/zakojuvenizuniw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/89941070534.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/fezisuxalemiweniluwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/xapas.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_off00007509.bin
df5412a31bd013f21888dd3da08c159c62efc46c940f3c954943227e990cd391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 5108 bytes
font_01_sfnt_off00008670.bin
c5d9e4fe6aa745b539c816881aaa9d36b12f7043eb54f4df0b3a3b8b636ceb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8670 10388 bytes

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