Malicious PDF — malware analysis report

Static analysis result for SHA-256 169a2291eb604e42…

MALICIOUS

PDF

38.1 KB Created: 2020-08-22 00:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b8dcbd86a8b6604e8503d9c4fe12efa SHA-1: 591b3c3558b2da12aa89d749236e9aefceb5315b SHA-256: 169a2291eb604e42e28fc5c389cb4b68d6e8df95112845b31bb56279dab90d68
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to harmful sites, likely as part of a phishing or SEO spam campaign.

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=sky+movie+action+tv+guide
    • http://xesuda.maryqueenofireland.com/uploads/1/3/2/8/132814930/wizizala_fopupobilirisi.pdf
    • http://files.spiritandtruthchurch.net/uploads/1/3/0/7/130739155/motofatipo_rojas_nugaguda.pdf
    • http://files.westhay.com/uploads/1/3/1/4/131453894/7324285.pdf
    • http://files.skylinepuppies.com/uploads/1/3/2/7/132710784/tuwedowolevaz-vosusow.pdf
    • http://lifuno.deborahjonesdesign.com/uploads/1/3/2/6/132681352/zunat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/xolaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6887/3112/files/repiwekegalakafew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/kigubijudureruvipobajaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/10607772736.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2149/files/41759729047.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/nibof.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/aeriforme_significado_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/pazilete.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/sda_church_clerk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2650/files/10632057897.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/55220196887.pdf
    • https://cdn.shopify.com/s/files/1/0437/1480/5914/files/aspects_of_culture_and_society.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b1e.bin
642083b66c14a71862e448479ac866ef0d86097d4649a4a359e389f4916ec2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1E 5164 bytes
font_01_sfnt_off00005c9b.bin
1ad6d077861d52cb4049f6d112d8f22cb80a65a58af2ac3782b3a702a59d93ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9B 9680 bytes
font_02_sfnt_off00007d74.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D74 4324 bytes

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