Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af967edb0edfed9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-13 23:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bac7d09d65ed9f2fd5e8ae3aa5db36dd SHA-1: 21947d276c457dcab7d2c83d60d4ffe54ec549b4 SHA-256: 1af967edb0edfed9ce7228651beccbdb56a107c408a6d51a2ff3d82bf98f1e11
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting an SEO poisoning or link farm attack. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword related to a medical condition. While no scripts were extracted, the sheer volume of links and the nature of the redirector strongly indicate a malicious intent to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=plexiform+neurofibromas+in+nf1
    • http://repage.costamedicalmarijuana.com/uploads/1/3/1/0/131069839/kozuxugasepofi.pdf
    • http://files.followmetofifty.com/uploads/1/3/1/4/131437074/vajasilunumafi.pdf
    • http://bivewonek.madridistasatl.com/uploads/1/3/1/8/131871991/kuwuk-jisugibafuvuni-furuwutif-muzanubi.pdf
    • http://files.subtek-music.com/uploads/1/3/0/7/130739898/a60d44e.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/binomial_multiplication.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/ruvubadilakipuzilesavom.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/bozuto.pdf
    • https://cdn.shopify.com/s/files/1/0443/9814/9798/files/barron_s_gre_verbal_workbook_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/55988837988.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/mizutibara.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/gabidudolezirovepoxufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/71439912384.pdf
    • https://cdn.shopify.com/s/files/1/0450/3424/2198/files/factors_affecting_channels_of_distribution_in_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/sitokizawoligufudatule.pdf
    • https://cdn.shopify.com/s/files/1/0441/0431/9128/files/sovokuxuxupumiwuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/xavubofemeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/81951104933.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_off00008425.bin
d49dd7676d7adfb7371528891e95e36b93404af420146ce66521cda5d59514f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8425 5172 bytes
font_01_sfnt_off000095ac.bin
e20bcddc193c7901a3ba4a524510a32170293593c05f0269ea784b2737efd0cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 10980 bytes