Malicious PDF — malware analysis report

Static analysis result for SHA-256 3077593545367e09…

MALICIOUS

PDF

35.0 KB Created: 2020-08-17 11:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10fb11fa2e77ef1940b1c377c70d8013 SHA-1: b610c004db71e57da76b758f24c9a26938160fe7 SHA-256: 3077593545367e09038908315477adefd85b13e4a76d30e9e346c3f1b12756db
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=best+split+head+king+sheets', which is likely intended to lead the user to malicious content. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic, further supporting the malicious intent.

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=best+split+head+king+sheets
    • http://soderifi.katepwabeach.com/uploads/1/3/1/4/131405965/galif.pdf
    • http://files.carrieblanche.com/uploads/1/3/2/7/132740241/firobutunewolovebavi.pdf
    • http://files.dehoniansocialjustice.org/uploads/1/3/1/1/131164020/tejaj.pdf
    • http://files.reinventeddestiny.com/uploads/1/3/2/7/132712326/3b165c727f277b3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/82215675393.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/boat_trailer_guides_for_large_boats.pdf
    • https://cdn.shopify.com/s/files/1/0439/2363/6379/files/biwikazuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/zixekusafusisovawikoma.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/69966502636.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/95139428725.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/google_safe_browsing_report_phishing_site.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/molibewapotuvomuguputu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/fekuxomuvatiremowir.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_off00004ba3.bin
9331cb5d497327a75a19c2da61887f0a1cfff80a42f9a5b6621beed321be3acd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA3 5240 bytes
font_01_sfnt_off00005d6c.bin
80c9ee33a24b9b51d69b0ac6647bae4b97fce9f6dcb8f67fa80b9a8567750945
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6C 10020 bytes