Malicious PDF — malware analysis report

Static analysis result for SHA-256 86027add9482c8e2…

MALICIOUS

PDF

50.7 KB Created: 2020-07-31 17:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d0ace55942e1d5935b832c52da726c3 SHA-1: a871b9a332f920bd92ecab783add6e620024a802 SHA-256: 86027add9482c8e201a8d1554b3e40cc057e64db3e0e0a4902f9f8e8c07c177b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or generate traffic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful infrastructure.

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=the+magician+king+lev+grossman+pdf
    • http://files.thepathofservice.org/uploads/1/3/1/4/131407849/tokigedut.pdf
    • http://files.gypsychicks.ca/uploads/1/3/2/7/132710763/dozozuxoji_wenumu_dajesezili.pdf
    • http://files.rewalsarsponsorship.org/uploads/1/3/1/3/131379443/xevovewub_kiten_ziruxad_wopikirul.pdf
    • http://files.katherinemgjones.com/uploads/1/3/2/7/132712383/nobomedijevato_fajexobodelaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/33863956830.pdf
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/wamasewiliduw.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/61402936544.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6933/files/77349524644.pdf
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/12777895271.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7525/files/buwadaredubife.pdf
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/menugisori.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/95422175616.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/patufidigox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/4905434134.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/75881404174.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/66939734826.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/university_of_waterloo_campus_map.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_off000087f8.bin
0a580e8a0c3c949d152a56e0375cfcc5ea3bb9f634aba5ad9a33339d7bdce9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 5640 bytes
font_01_sfnt_off00009b06.bin
be43e189e6cbe82186010403f13a1b2a68899e1100e7f5936d545b8b8066850e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B06 10060 bytes

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