Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b5955d22c48b6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 14:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e63527c1040d62d22a051f54fde4864 SHA-1: a0fda36c9b40a11d299e6bc02fda2bae855152b6 SHA-256: 618b5955d22c48b6548007bfb658e444d875bf02bbe1aeb81246cf5423aac000
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or potentially malicious domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern observed is the creation of a link farm designed to redirect users to harmful sites, likely for phishing or malware distribution.

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=business+model+canvas+vs+lean+canvas+pdf
    • http://rilejiluw.honeypotcreativecafe.com/uploads/1/3/1/3/131398368/3b051e011c0.pdf
    • http://files.artofmichaelnguillen.com/uploads/1/3/1/0/131070561/kikolenif-katutikuz-tiraso.pdf
    • http://files.jeremyboros.com/uploads/1/3/0/7/130739084/8249200.pdf
    • http://files.sbcopywriting.com/uploads/1/3/2/7/132740218/644292.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/musafopodesipagiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/precalculus_cynthia_young.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/59012158369.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/86551609676.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/58376978350.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/94521291907.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/venafamoketufewokimotagut.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/romomapom.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/fexemiligasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/51368301465.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/wakulofiragi.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_off00006728.bin
e5d39761b29a356c43c3395af04336ef8fe8a6805b3d3ed8e8103ef5f357d8a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6728 5312 bytes
font_01_sfnt_off00007933.bin
5cc89d0f71c6bd2d2e275070198672af2da7114b8e106001997d0feddd14ddc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7933 10552 bytes