Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bece2499c6cd78…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 08:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3974cf6201753b172a27ddc777db7ea SHA-1: 3056020c4b2007241c216ed0322d86588d7674b9 SHA-256: 83bece2499c6cd78354d5fd7448b53c33d5f48737846cd367b63ba7596a01fe9
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain text related to energy sources, likely serving as a lure. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. The primary malicious IOC is the redirector URL, which is designed to lead users to harmful content.

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=difference+between+renewable+and+non+renewable+energy+sources+pdf
    • http://files.piratehaterjenny.com/uploads/1/3/1/0/131069887/vusuxitufogebasamu.pdf
    • http://dopod.georgeandphillips.com/uploads/1/3/1/8/131856330/60725.pdf
    • http://files.encorect.org/uploads/1/3/2/7/132740234/844fbab0cd14d2c.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/bobes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/warframe_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/20948918804.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/galimagamijuxabegaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/45972430153.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/gold_s_gym_resistance_bands.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/gavisajezalobusufeludak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1167/files/xedaxamijipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/acid_base_and_salt_notes_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/4071/9516/files/rizuramivajikado.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/21178523876.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/86225543786.pdf
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/kazisiwarep.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_off00006032.bin
3beb27b817bf1bff964d3dbb7aa2a73ce9994b36370b417be88b4e6c8c7e6317
pdf-font-stream PDF embedded font (sfnt) at offset 0x6032 5656 bytes
font_01_sfnt_off00007399.bin
b629c5fd8ba361012b0941c81176bee98ad888a5884472bff5d0100255da63e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 9788 bytes