Malicious PDF — malware analysis report

Static analysis result for SHA-256 d214a0b2dd404f2f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 21:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25b7bd1b8520a6d941a04ea5eeb3c28b SHA-1: ef6e52e7f1ce6db8dacaf81a9799e226861c3a79 SHA-256: d214a0b2dd404f2f7156d5a1d26fec3233ac4503c96c2082d59221d273e3cdcb
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a fishing report. The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely as part of an SEO spam campaign. The ML classifier strongly indicated maliciousness, and the PDF structure itself suggests a malicious redirector.

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.cc/pify?keyword=fishing+report+greers+ferry+lake+arkansas
    • http://files.jeremybraden.com/uploads/1/3/0/7/130739155/bafevas.pdf
    • http://files.aguirrelegalnurseconsulting.com/uploads/1/3/2/7/132741429/famutifoguj.pdf
    • http://files.ntqgchicago.net/uploads/1/3/0/9/130969673/kemebanogiridan-fawotovizu-belimu-sebimalix.pdf
    • http://files.yogalotuspond.com/uploads/1/3/2/8/132814935/5c8f75f8.pdf
    • http://xilexal.christophermannino.com/uploads/1/3/1/6/131637814/6447277.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6133/files/69568333063.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2053/files/list_of_all_accounting_standards.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/badalebotizekuzalufan.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/discord_background_hex_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/3423212698.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/finekovovup.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/ciclo_biologico_de_ascaris_lumbricoides.pdf
    • https://cdn.shopify.com/s/files/1/0434/7170/0120/files/panaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/99305649286.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/runodekevos.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/lopazowarokonaxonel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/carnatic_music_notes_in_telugu.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_off00006ab5.bin
4e158f95e87c7b59735a76d41872713e2411131ba71230e41fbe7fd70be6aa53
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 5284 bytes
font_01_sfnt_off00007cab.bin
42da2821dc4d2015e9efe22df6143d19202e68ac4116ed45ff0a0d76bae3f39d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 9992 bytes