Malicious PDF — malware analysis report

Static analysis result for SHA-256 3550ac6bea1ce5bb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 16:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca67a54c6907abc6f5ee53e043464ea0 SHA-1: 2a84a9446767486f7b5f950b52e76ca3ee70df51 SHA-256: 3550ac6bea1ce5bb67237722c285c6fe88c9f2859b5077fbea49b2e07e6cada4
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it contains a mass external PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the extensive link farm suggests a delivery mechanism for further malicious content or a technique to inflate search engine rankings for malicious sites.

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=posthuman+glossary+braidotti+pdf
    • http://redidewu.kidsonuptherapy.com/uploads/1/3/2/6/132681946/gazuselizagan.pdf
    • http://files.publicschools305.org/uploads/1/3/1/4/131408970/fidumipudefi.pdf
    • http://files.sbufootball.net/uploads/1/3/1/4/131411896/172935.pdf
    • http://files.rubysgift.net/uploads/1/3/1/0/131069887/ravelojinifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/tofuluromagenikafelamen.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/nakuzidamezuzasoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/bafojesudaguwovibufenagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/xewomiselukutesulobof.pdf
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/tawilemibavosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/dejikupilewasik.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/zapogit.pdf
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/ripilalasukegozubot.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/66886338976.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/rumukurejelokoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/xesoku.pdf
    • https://cdn.shopify.com/s/files/1/0448/3714/2689/files/bin_sachivalay_clerk_syllabus_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/fitewelijixajaxuwufatiki.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/xegedijewisekujadi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5010/4982/files/dijekulovefolibiwox.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_off0000694c.bin
d1c178c9a51afc60e0a8dc1f89a8ed2444291322a885a07ab6142d98a485e2b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694C 5700 bytes
font_01_sfnt_off00007c85.bin
04311ccb610ce0f64e39579b155e9a01253adf80ef002a3cca3475fbb4bd9de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C85 9860 bytes

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