Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ad2e50a008cf33…

MALICIOUS

PDF

49.6 KB Created: 2020-08-08 07:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 044e4305e8feaacae7022474cd673d67 SHA-1: 09181fee5e1e3a943b2734bb62edf96f31325548 SHA-256: d6ad2e50a008cf339ff0cc8be1e6fab2b7de002f841f662ec5fad0da8f6e54f1
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 link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=basic+english+grammar+teacher+s+guide+betty+azar+pdf, is used to redirect users. The document body contains garbled text and embedded URLs, consistent with a PDF designed for SEO poisoning or to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery.

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=basic+english+grammar+teacher+s+guide+betty+azar+pdf
    • http://files.anumandra.com/uploads/1/3/1/8/131856883/xefajotefebedexegimu.pdf
    • http://zewara.stickstretch.com/uploads/1/3/1/4/131406082/voniwevunevada.pdf
    • http://files.recbarlouisville.com/uploads/1/3/1/4/131452811/wuwojubegenoko-welajokiwuwofis-xofobedulu.pdf
    • http://files.morpheusandiris.com/uploads/1/3/0/7/130738569/76a393.pdf
    • http://files.surfsportsforum.com/uploads/1/3/0/8/130814575/371b863d7.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6392/files/jukag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/july_2020_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/5630895211.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/bland_diet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6003/5735/files/78191215552.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/52505308308.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/80547100519.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/donudiwoxakupep.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/32552606779.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/samuxoweluwuvewesokemewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/vibovodozerufuxupure.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/occupational_exposure_band.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_off00007613.bin
e2edeb5de9377b71c098fd5ef4cbc7ab40d1c4b8c814fcb1ef796a8a4de0c57e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7613 5912 bytes
font_01_sfnt_off00008a0f.bin
b08f71c5e07a173e28f9f7fa17db30382e6ffaae873bf22f0874c3858416f89a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0F 15280 bytes