Malicious PDF — malware analysis report

Static analysis result for SHA-256 386faafe51447566…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 12:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e404ba92fa872ff111ae2ff050e7e7e2 SHA-1: 92e67b6ed75a6f9e4ab4d7b68e8dc3c3e12718d8 SHA-256: 386faafe51447566fb58377b237598eb9c9398017b00f0ef97ae536ea9d61b03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=rechtschreibung+%25C3%25BCbungen+pdf'. The document body itself is heavily obfuscated and appears to contain a mix of text and binary data, but the presence of numerous URLs, including the malicious redirector, strongly suggests a phishing or malicious redirection attempt. The ML classifier also flagged this PDF with high confidence.

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=rechtschreibung+%25C3%25BCbungen+pdf
    • http://files.mhcgb.co.uk/uploads/1/3/1/4/131452735/4396136.pdf
    • http://files.davemcdermand.com/uploads/1/3/2/6/132695361/faxevedepu.pdf
    • http://files.lecharmantarts.com/uploads/1/3/0/7/130738799/xifoso-jokajej-bajopawejut-tolefev.pdf
    • http://files.carolynnason.com/uploads/1/3/1/0/131070051/koxuwis-duwun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/engineering_economic_analysis_12th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/96781080169.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/jivanujosedimerubozagoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7423/files/fadupopusavelozesoraxadi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/the_holder_of_a_promotional_permit_may.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/25493339031.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/45508285537.pdf
    • https://cdn.shopify.com/s/files/1/0434/6059/1776/files/71331560631.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/lava_uke_chords.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/tosajeravuvakomovume.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/sotajasipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/sevujemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8962/files/xolerupejokipifebojuxane.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_off00006cec.bin
cb9125e2c9423a4fe90d40d2bb107eb9efb5d08ec9cf6845f29fdccab79198ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 5444 bytes
font_01_sfnt_off00007f2a.bin
c4b8d89b78e8669b42375276f5c3e52936c14a38f8c90ecea0a6eb89b5960d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 14624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.