Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58301fb2ae85623…

MALICIOUS

PDF

52.2 KB Created: 2020-08-30 10:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350203ad89aaab888eab8de06b03a2b4 SHA-1: eadfe95b42bdd0635b5a34c60d1670c4af0e02a4 SHA-256: e58301fb2ae85623c119ddad4728cc090cecc9a14c117cb9141ed84b4d97e3c7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body text and embedded links suggest a lure to external content, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the PDF structure exhibits characteristics of a link farm designed to obscure the ultimate destination.

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/wix?keyword=agreed+upon+procedures+report+format
    • https://cdn.shopify.com/s/files/1/0465/0562/3710/files/wunuseledafas.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/nobagubijapujaranelijub.pdf
    • https://cdn.shopify.com/s/files/1/0447/7625/9735/files/dimensionamento_na_administrao_pblica_federal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5046/files/18952819566.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/zodewipujopuzob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30549310566.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/97637239063.pdf
    • https://cdn.shopify.com/s/files/1/0450/3601/1678/files/36281594445.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/12178223566.pdf
    • https://cdn.shopify.com/s/files/1/0432/5389/1232/files/tyranid_codex_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/xemikexixiserulu.pdf
    • https://cdn.shopify.com/s/files/1/0444/6031/0695/files/the_golden_lily_richelle_mead_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/43478889410.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/bixovejis.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_off00008e9b.bin
ca06d582deb545871c7c5478ca408918a61842f47df09f946c6b0fc6e00a7294
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9B 5432 bytes
font_01_sfnt_off0000a0f4.bin
236b89678d232d5f46dcec3b53ffa6aa6e5e1c3f190d4acdf0ca7d12fe93674e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F4 10144 bytes