Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f2d115c07cd3b1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-19 19:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f81ed22fd404201fa754e4bfca0aace SHA-1: 8cc33071025f293d80115800713cf6db41aac07a SHA-256: 19f2d115c07cd3b143463e833ce67cec72c47de1d0bf02093d7e5b349472eb78
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes a URL that is also present in the heuristics and IOCs. The primary attack pattern involves redirecting users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.cc/pify?keyword=abu+ambassadeur+7000+manual
    • http://zaredowa.campaignforcloth.com/uploads/1/3/1/8/131856919/xirimuxa_tajumivewaburuz_gewomageda_jolegiki.pdf
    • http://files.naturalmusicmarketing.net/uploads/1/3/1/4/131437158/e0d62c2a12.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/public_school_calendar_2020_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/rogabosofel.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/40305082906.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/roxuluzorugevepuwugiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/kmart_micro_flannelette_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/57867982876.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1557/files/angel_eyes_abba_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/receptive_skills_and_productive_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/gozatanisuxetitabobanodot.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/15127052889.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005938.bin
41fbe9b16c4201668bed4783d737cf69d1ea4cfcd68c774643383a627ca36d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5938 2920 bytes
font_01_sfnt_off000063a9.bin
63538106b1dac150c556c71aab9e943e84ee35de45b0aa566ecada6cf9285284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 4964 bytes
font_02_sfnt_off0000745a.bin
c065b50cdc463d07bc2f08ca3d6365616efdd10f2ee5629dc96536a5a6096bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 10128 bytes
font_03_sfnt_off00009714.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9714 4324 bytes

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