Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12f6546b20e5264…

MALICIOUS

PDF

43.9 KB Created: 2020-07-23 04:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 637404dd1a51d46bee65f112aaa8bea9 SHA-1: 0b4867ce9efda5cc1bcac81a025ff1cd4c60729e SHA-256: d12f6546b20e52644681c900e378ca0043deebc9b83711a30a15f2bd0c0a5f09
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised as a Grundfos alldos dosing pump manual. This indicates a phishing attempt to direct users to malicious content. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO link farm abuse to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=grundfos%20alldos%20dosing%20pump%20manual In PDF document text
    • http://files.fortdavisalabama.com/uploads/1/3/0/8/130874029/tapubisiwemarexikos.pdfIn PDF document text
    • http://files.mikeseta.com/uploads/1/3/0/8/130874671/ec98c7b0e58edd.pdfIn PDF document text
    • http://files.emteacher.com/uploads/1/3/2/6/132681694/829c802cc872a17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/97777576557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/kotaweveximiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/71136860840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/memiwonez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/44795293121.pdfIn PDF document text
    • https://zovaxageloj.files.wordpress.com/2020/07/tatewekisexutokorekidono.pdfIn PDF document text
    • https://sonepegupevo.files.wordpress.com/2020/06/kojogufalokati.pdfIn PDF document text
    • https://jizogozup.files.wordpress.com/2020/06/94128011417.pdfIn PDF document text
    • https://talafup.files.wordpress.com/2020/07/23279758655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/xaromosunifegaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/30795855765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/piwakaminiletaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/44709126760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2388/2650/files/45319138044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/juzevo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F39 5076 bytes
SHA-256: 7f5aeb61f66246d7a33ea79cda3d91ff0bfc48d6121a3e1ca15ac1571fa5502d
font_01_sfnt_off00008057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 9928 bytes
SHA-256: 16266894d0cdf8eee6e3b2f1190ac14f3a2ac3c7e13d932ed2ced62328997022

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