Malicious PDF — malware analysis report

Static analysis result for SHA-256 2826f6aaec1b6137…

MALICIOUS

PDF

119.4 KB Created: 2020-08-06 09:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 085bf5fa3252f979ef0cc7b4f0923b84 SHA-1: 8637d5a801c5b81d0f9b0015ea055e71d3c0d236 SHA-256: 2826f6aaec1b6137ae162a60ad8d655eb0d27a0fe023fe5893950a463b2e570a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=human+activities+that+affect+the+environment+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

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=human+activities+that+affect+the+environment+pdf
    • http://gijefex.lindagreenup.com/uploads/1/3/2/6/132695663/2f89f.pdf
    • http://files.jhcfirestop.com/uploads/1/3/2/6/132695732/fabikevugupi.pdf
    • http://files.hawkknifedesigns.com/uploads/1/3/0/7/130738657/f689c67.pdf
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/fawefegiditilope.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1671/files/wobedexozututuxakumabiwu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/gofofuverinefejibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/bureaucratic_politics_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/73485061053.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/xatawajovetitevaxixirowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0437/6310/5953/files/json_to_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/tekupexazofevezisede.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/49567728951.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/sarevumiwolu.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_off0001996f.bin
5e97eef38f09795a0ab33d2744ed6575d8538ac29e2644b7fbbaf395db2c1ed9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1996F 5384 bytes
font_01_sfnt_off0001ab95.bin
71381651b1a9b0024abfbbcdeb54ee6ac6f5d8fbe720c164b9be2e4172e15c76
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB95 10704 bytes