Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba3a89c76c18be1…

MALICIOUS

PDF

50.8 KB Created: 2020-08-08 20:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d98cf77edb58a8e1411d659add4af1e8 SHA-1: 551c8d9e3650d4f78762d2efd7c28296cc4b0705 SHA-256: bba3a89c76c18be1e38b2bdffbac3215380d2eae37c5672dcc991e5ce660c943
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=pension+actuarial+mathematics+pdf, suggesting a lure related to pension actuarial mathematics. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to obscure the malicious destination. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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.ru/pify?keyword=pension+actuarial+mathematics+pdf
    • http://files.joanletourneau.com/uploads/1/3/0/8/130813827/varovipulofu_gajixir_jigamakutiseg.pdf
    • http://nejadali.sandytoessociety.org/uploads/1/3/1/3/131379578/4788057.pdf
    • http://files.raiseyourvibration.yoga/uploads/1/3/1/3/131382470/7993636.pdf
    • http://files.psautoworks.com/uploads/1/3/1/4/131407796/1a4b5bb69ec0.pdf
    • http://files.constabilephotography.com/uploads/1/3/1/4/131437987/vowew-xanifavewolivit-fesij.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/wupasolajodefevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/tixeximolulot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1047/files/9048126982.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/82448302434.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/wurofux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/xarow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/86363421076.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/13298659001.pdf
    • https://cdn.shopify.com/s/files/1/0440/0106/7166/files/rewodukusafupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/livros_neoliberalismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/ibm_aix_unix_commands.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/burabulujixexifomed.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/
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/tixeximolulot.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fa7.bin
34cb1cfc1853d33378e2ded1712394ac9b68dc3b9a6967d7ecbfcbc879687edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 5396 bytes
font_01_sfnt_off000091d6.bin
9a687d8d9222e4a7d3c9e6942d6ceb3e0817ea0be343813b50e35e34cc977703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D6 13832 bytes

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