Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1f3c7b22e01a69…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 14:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cf35d3c6459a54069e1e657a843cc7e SHA-1: 49a705b46fd6c4af3e8b190dd05af1b68eed5932 SHA-256: 7b1f3c7b22e01a690a005b98413c4f7815d288ac8550bd2b28feb3d3522c0662
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 external PDF links, indicating a link farm. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The document body contains garbled text but includes the malicious URL and several other URLs hosted on Shopify and other domains, suggesting a broad distribution effort. No scripts were extracted, but the presence of numerous links points to a delivery mechanism for further malicious activity.

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/wb?keyword=the%20woolgatherer%20william%20mastrosimone%20pdf
    • http://files.sternulaba.org/uploads/1/3/2/8/132814343/xibamimi.pdf
    • http://sugukaz.womensclubhackberrycreek.com/uploads/1/3/1/0/131069839/042a7ab453.pdf
    • http://najuwoniv.newdrofscifi.com/uploads/1/3/0/8/130814017/nekenove_muvuri.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/memazixelilagolobejujeteb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/vafatuwoxalamusij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/calles_de_lima_y_meses_del_ao.pdf
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/84730718719.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/navemuvirukanemodepadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/30108724348.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/80917559456.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/12544115809.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/27661684062.pdf
    • https://cdn.shopify.com/s/files/1/0451/6613/3397/files/boule_de_suif_rsum.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/32875709005.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/kafimexewisuwokinavuzuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/34938355483.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_off000067bb.bin
f0c5d2261bd927a07b02056ea31771918f7e8630c77fc198ab2c87616e808647
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BB 5496 bytes
font_01_sfnt_off00007a63.bin
8e8141e86afde50f51b9ab58dc594ebc0a12a07846a549e2023243a22560ce31
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A63 10420 bytes