Malicious PDF — malware analysis report

Static analysis result for SHA-256 1394a418a1f882cf…

MALICIOUS

PDF

44.9 KB Created: 2020-08-28 03:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b9c280331ca8f4c39818f68c1a809a5 SHA-1: a5714c20b08fcf90c4d61a10018c1b6aa15f1f32 SHA-256: 1394a418a1f882cfa264e9a5c6a65972c28afe5a19bf56b34bf821ad1104bd0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains URLs that are part of a link farm. This suggests the primary purpose is to lure users to malicious sites, potentially for phishing or to download further malware. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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=rulers+of+evil+review
    • http://files.guyingram.com/uploads/1/3/2/6/132681596/3295852.pdf
    • http://jirem.re-imaginekernow.co.uk/uploads/1/3/2/3/132302782/lejoxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/25014344249.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/antique_olive_roman_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/rixuzubijowax.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/takezenineru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/picsart_apk_old_version_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/jevujow.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/estrus_cycle_in_rats.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/zevomapito.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/lexidoxifonelake.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007396.bin
28b9fe356ad06bed3a6320110d6c4098fe23b415a778368f71d120155a8dffcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 4712 bytes
font_01_sfnt_off000083c6.bin
9ee00676e5270ccc54bbfe0164c160dabb01459cb52d6f13d75cbbcda7de4b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C6 10388 bytes