Malicious PDF — malware analysis report

Static analysis result for SHA-256 059cc83b079442c3…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 10:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe7c3d909619bdbaa53f0bc37d10eb22 SHA-1: 493bab786c0600efc5271b215f5d22df40860c92 SHA-256: 059cc83b079442c3ce2197fbe224c43defca27f3d339e70c1b6e72853acc0925
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic firing indicating it leads to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting a lure related to 'hourly rate expectation' and includes the malicious URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used to distribute malicious 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.cc/pify?keyword=what+is+your+hourly+rate+expectation+answer
    • http://files.lisalightfootgallery.com/uploads/1/3/0/7/130740363/rawajalo.pdf
    • http://files.addo-pix.com/uploads/1/3/1/4/131408572/kapilo.pdf
    • http://kasoru.mmsoul.com/uploads/1/3/2/6/132680835/padebedoneravu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/gufaruser.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/devexpress_report_designer_internal_server_error.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/98617949413.pdf
    • https://cdn.shopify.com/s/files/1/0432/7922/0891/files/miligazilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/makemkv_1._10._6_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/fubawubutizugijusisanok.pdf
    • https://cdn.shopify.com/s/files/1/0440/1129/0782/files/rupupepenidubop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/enlaces_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/apostila_alemo_basico.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_off00006948.bin
703e0a92e9374a78dc685b17c5fbfc0c4cfd433e20033f30dd8a337b0843d9fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6948 5296 bytes
font_01_sfnt_off00007b6a.bin
1e0230c34eb243e43bad0ede739d0d825371c734f9fc282e089e4fa96aff47bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6A 10120 bytes