Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38a80aa4001a750…

MALICIOUS

PDF

45.3 KB Created: 2020-08-18 18:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba70a87e17e64ac5066994330a1c296b SHA-1: 391fda487717ffabeb84e105cbc4e91bf91ed494 SHA-256: e38a80aa4001a7505316d4e6379cdaba7d7b79c6d79e2b0944ed541aa1d79d1b
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious link, "https://ttraff.cc/pify?keyword=what+does+asbestos+cement+sheeting+look+like", is presented as a search result, likely to trick users into clicking it. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to the link farm.

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.cc/pify?keyword=what+does+asbestos+cement+sheeting+look+like
    • http://mamekena.sistereducator.com/uploads/1/3/2/8/132814930/8968930.pdf
    • http://files.rollingforkorganicfarm.com/uploads/1/3/1/3/131383651/latinugo_ridesagem_memumuxolulujij.pdf
    • http://files.sabatinomangini.com/uploads/1/3/0/8/130874042/bisevan.pdf
    • http://vepuz.brentwoodpetresort.net/uploads/1/3/1/3/131398473/a8d3215dc.pdf
    • http://benogaza.yakimatietonirrigation.com/uploads/1/3/1/4/131483083/2989895.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/70231427808.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/1998_ashrae_refrigeration_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/minimize_file_size_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/xidepaputidazipivulusetum.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/radibijuzojira.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/zifaxunajazolaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/xowenolov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/chest_anticoagulation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/28148658099.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_off000068d7.bin
a5ea419aa6750fd97fc0d45968700c316a9361fb8f08a0a8244fb90aa11beba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 5476 bytes
font_01_sfnt_off00007b64.bin
8fdf0ac83c624de0c06898fe198893f86735b140b3fc1ca4021f4d1a8ac59b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 14300 bytes

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