Malicious PDF — malware analysis report

Static analysis result for SHA-256 8149508706934c95…

MALICIOUS

PDF

35.8 KB Created: 2020-08-18 20:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32da9faba7905d93baeaf10c2472ffe4 SHA-1: 21a0b0b4bff57e43414950cd7c89ffcc58d3982d SHA-256: 8149508706934c95cdfb7d64ddcccc7486477d258d44aaa2129baa6393e1fcf2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cushman wakefield market reports' and includes the malicious URL. The primary attack pattern involves tricking the user into visiting a malicious URL via a deceptive document.

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=cushman+wakefield+market+reports
    • http://kelojareg.mervilleunited.com/uploads/1/3/1/6/131607321/a99c443087.pdf
    • http://files.bartlettandgoldgallery.co.nz/uploads/1/3/2/6/132681494/nifulilujef.pdf
    • http://files.botezatconstruction.com/uploads/1/3/0/9/130969241/927049.pdf
    • http://files.tridentpest.com/uploads/1/3/1/6/131637316/suzubo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/gibagovuferopesexiduboref.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/wibiwobomepuruvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/deresojosos.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/kodasinuteromubunubaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/lesiruvujubazesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/biology_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/38508687809.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/72228867174.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/acalculia_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/kozuvoduxemunasarog.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/bundesliga_spielplan_2020_19_rckrunde.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e1f.bin
3de5bfc79edf650f1eb3b3fc89a5c7907ae245228a573ba6efef474e810cf0fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1F 5344 bytes
font_01_sfnt_off00006033.bin
871b6e2cf99026e310f17bf7d4431137c64ec3487e8ba64e42f59182b5b2d5f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 10028 bytes