Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad186a6e2792d0e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 08:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53cf555776522dde5c9e07de23dfc78a SHA-1: 2b199f63eaae9f3aece07511be9dfdfa8ce46776 SHA-256: 5ad186a6e2792d0ed4fc6abdf623ef4470213414f0069b34d0c9806c9540bd36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body itself is heavily obfuscated but contains references to the malicious URL and other URLs that appear to be part of a link farm. This suggests an attempt to drive traffic to malicious sites, likely for further exploitation or phishing.

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=calidad+de+vida+en+el+trabajo+juana+patlan+pdf
    • http://files.apologiesfrommen.com/uploads/1/3/1/3/131380316/2806235.pdf
    • http://weguta.empressboatclub.org/uploads/1/3/1/4/131483281/7355611.pdf
    • http://files.reliabletrust-translations.com/uploads/1/3/2/6/132683484/bobinusepixubag.pdf
    • http://files.maxiesknitwear.com/uploads/1/3/1/6/131637635/renefusi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/length_unit_conversion_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/mawasemawigilux.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2430/files/77266595016.pdf
    • https://cdn.shopify.com/s/files/1/0444/3042/6278/files/panasonic_aw_ue150.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/cloak_of_the_bat_5e.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/nuwajosowaleku.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/12494747168.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdf
    • https://cdn.shopify.com/s/files/1/0437/8073/5138/files/manual_caldera_baxi_mainfour.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/heil_heat_pump.pdf
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/vemuzuzozuzulorutofinuke.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_off00005d17.bin
0a93eaf429b59b2422386e3a06f082620d466e02b6de0dc1da7c700662255748
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 5040 bytes
font_01_sfnt_off00006e4f.bin
11bf674d225aeaa80d98ef0f10b3bd82079cdb7ef04aeff25a790d715bedcc6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4F 11744 bytes