Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0ba5c1013b6b6a…

MALICIOUS

PDF

36.9 KB Created: 2020-08-02 17:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1bcd33c0c64d85b58eec75a6fc59d54 SHA-1: 05cdb58c0fda8aea4129ae4b5d4c8bf5fe3b94cf SHA-256: 7c0ba5c1013b6b6a6e400cd270d56eaf342db81df5def0baa108a5299665eb63
152 Risk Score

Malware Insights

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

The PDF file 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 URLs, many hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to click on the malicious link within the document.

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.com/pify?keyword=donell+jones+where+i+wanna+be+mp3
    • http://files.collisterunitedmethodist.org/uploads/1/3/1/6/131637546/fefetube_foronu_viranarif.pdf
    • http://files.2018eradreview.com/uploads/1/3/2/7/132740277/e3d7dd9923.pdf
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdf
    • http://files.benedicthillshoa.com/uploads/1/3/0/8/130814666/dbc60c.pdf
    • http://files.oehlermill.org/uploads/1/3/1/4/131408280/9091110.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/30861688406.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/16425071316.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/70127082971.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/91058827624.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/the_macro_economy_today.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/73521724362.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/79823349416.pdf
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/guwofitasukusanewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/siladiwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/bupawosefopikitav.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/fadeluw.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_off00005097.bin
74f202972dbe1c8e53a811e1a165e37a81556fae90f49eecae9bdf6bd9ed43df
pdf-font-stream PDF embedded font (sfnt) at offset 0x5097 5528 bytes
font_01_sfnt_off0000634c.bin
8ca019afbf59af23c298cc91f33a4929f125ff514c5078e959ec259924cb10e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 10340 bytes