Malicious PDF — malware analysis report

Static analysis result for SHA-256 a867bcdd808da219…

MALICIOUS

PDF

44.3 KB Created: 2020-08-03 15:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ed66a8fa5297a5084a2d33cbd32878 SHA-1: 7b5cf479c9f237d559b33bd3dba6954cbeaa9ee3 SHA-256: a867bcdd808da2194cf552fa04306de8c4d6341094da66ace8f4bf3e3bef915e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/wb?keyword=sommerferien%20niedersachsen%202020%20pdf', which is likely the primary malicious payload delivery mechanism. The ML classifier strongly indicated maliciousness, supporting the redirector link as the main threat.

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/wb?keyword=sommerferien%20niedersachsen%202020%20pdf
    • http://files.jasonfranklin55.com/uploads/1/3/1/6/131636781/tekekasalepika-kubizadeze-risawit.pdf
    • http://files.picotdoll.com/uploads/1/3/2/3/132303269/lijasusorexu.pdf
    • http://files.artbyvicki.net/uploads/1/3/0/7/130740142/861ace9223c5.pdf
    • http://files.thetidewaterschool.org/uploads/1/3/0/8/130874658/basowepilave.pdf
    • http://files.delythdaviesdesigns.co.uk/uploads/1/3/2/3/132302926/3032357.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/zisevufomipi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/22000719777.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/omron_bp785_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/digadetij.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/japarotivepowepapefikefux.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/world._execute_me.pdf
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/15946832353.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/80913513014.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/too_many_items_1._13._2.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/sabifepimazixudi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0217/4374/files/33637147313.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/20642597258.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/2161592944.pdf
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/mojuvupaj.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_off0000620d.bin
7518186185a343399b046c45e407c2266080216288c0f623f4d8803cf52df108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 5740 bytes
font_01_sfnt_off00007569.bin
72b1568b78b0081601aceccacd836c67f545e765fd8857c59900e8ba24bf611f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 14848 bytes

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