Malicious PDF — malware analysis report

Static analysis result for SHA-256 6076d8cb857753cd…

MALICIOUS

PDF

41.1 KB Created: 2020-08-02 03:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 216918d6e7bcfd675ff3a38d26fbe4cc SHA-1: 700f13ae0db8e089a62d72d65309c81779e7e41c SHA-256: 6076d8cb857753cdb29fe27f8974f646fd53151e48f72a2d96dc403fa323a334
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating it's designed to lead users to harmful content. The presence of embedded URLs and the link farm structure suggest an attempt to manipulate search engine results or distribute malicious content through a deceptive link structure.

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=wasi-+ii+manual+pdf
    • http://files.aoemedia.tv/uploads/1/3/1/4/131483254/f5e1c3a.pdf
    • http://files.eleanorroseoutdoorquiltshow.com/uploads/1/3/0/9/130969158/runopatilo_goxikotew_gemiwowezexel_foxofi.pdf
    • http://files.premierpoolnaples.com/uploads/1/3/1/0/131070238/d0e8edb4.pdf
    • http://files.thefashionanalyst.com/uploads/1/3/1/3/131383624/wezunawe.pdf
    • http://files.ninjamagik.com/uploads/1/3/0/8/130874629/jatupisejumelovavog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/75880592993.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/20829607660.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/joxolakufupimeriju.pdf
    • https://cdn.shopify.com/s/files/1/0429/9256/6435/files/rajakoxikenu.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/pehla_nasha_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/67466880937.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/32211903967.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/18588401869.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/kenmore_elite_oasis_washer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bb.bin
09367932bdb4c3e6c0ce3eb0f531fb2d32936bf73d14e32054f5e2f3fb46b49b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5136 bytes
font_01_sfnt_off0000743c.bin
8d4c8b1365c6d35be62ea7672ab3126f6177af66c8fb63c2c918e8c570b5d852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 10424 bytes

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