Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdeabd72c8a9817a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-23 21:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9fcab36a09549a05bef439ca20fd029 SHA-1: 171d150c3c148e19cd46b74c51eca75813278782 SHA-256: fdeabd72c8a9817a0ca70223f53924078b0f6043d23a0dfdc725aeda68074b71
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive document, leading the user to click the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=hess%2527+s+law+problem+worksheet
    • http://danipe.barbarafreedgood.com/uploads/1/3/1/3/131381787/pisaduj.pdf
    • http://files.ahbas.org/uploads/1/3/0/8/130814874/21eeee386af5b.pdf
    • http://files.chirocure.net/uploads/1/3/1/4/131405948/rolasuralunip.pdf
    • http://files.physicianassistantgirl.com/uploads/1/3/1/3/131384636/noxidugexavibexatuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/1364/3167/files/97211937671.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xuvoba.pdf
    • https://cdn.shopify.com/s/files/1/0465/2426/8702/files/nimetebafinaluxoxagari.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/writing_argumentative_essays_nancy_wood.pdf
    • https://cdn.shopify.com/s/files/1/0439/9398/9278/files/68369062891.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/xagupini.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/64765831389.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66491839223.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/42253303129.pdf
    • https://cdn.shopify.com/s/files/1/0451/3621/6229/files/99867156898.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/research_methodology_assignment.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/5140473813.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/72298443864.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/latigonevafokobimi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e0f.bin
756ab6037480aa29827fff948c9e4fa73fe9ec3eb61471467410de46954bafa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0F 4984 bytes
font_01_sfnt_off00005f0d.bin
31abe02d318ca7119e934fd27ba45e146437a1bc94804478b511a7b9cb0ad4ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0D 13192 bytes
font_02_sfnt_off000088ae.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AE 4324 bytes