Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d102dec4b2500f8…

MALICIOUS

PDF

37.9 KB Created: 2020-08-18 14:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6fb9fb353463e29659aaaaa76b1fac6 SHA-1: 3ff75c8c223bf270f15cb3d20806915f563ba26a SHA-256: 7d102dec4b2500f8860d10ec288a504d2ac00ace39ac2249da3d594222f94742
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a product search. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a large-scale SEO poisoning or link farm operation. No scripts were extracted, but the primary attack vector is the malicious URL.

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=platform+bed+frame+with+headboard+king
    • http://katelefu.nourishedpath.net/uploads/1/3/1/3/131398101/a0e43d73fb8.pdf
    • http://files.icuseminars.com/uploads/1/3/1/0/131070753/lawigijazulukameraz.pdf
    • http://files.fernandanavarro.net/uploads/1/3/2/7/132710491/c8f39e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/6016/2713/files/memopizapajelezusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/enfield_grammar_ofsted_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zovoxumaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/22687993951.pdf
    • https://cdn.shopify.com/s/files/1/0436/8941/0713/files/90292506842.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/16100282098.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/systematic_theology_free_download_grudem.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/44106771457.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/dekufupiseko.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/euripides_bacchae_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/mod_my_classic.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/fallout_3_4gb_patch.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_off000054e7.bin
bb513ed8a6e54b5d91309c5da9cf972cff1b353308e18680cebbb41edd3dbb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E7 5440 bytes
font_01_sfnt_off0000674f.bin
d75a24a2e8482062708fa8bbab6fa5310f83e60e70e9485e5c364a3a8495b1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674F 10444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.