Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cf2f2a84329e98…

MALICIOUS

PDF

32.9 KB Created: 2020-08-07 22:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e62d176883365e8e9d19c2e4562746f1 SHA-1: 7c62a4fbd31e425721adfec0cd5af3578c29a007 SHA-256: 14cf2f2a84329e98d3d37872d1c5dcb135731a4ae9f976d76705398358c896cb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of embedded URLs and the heuristic firings suggest an attempt to redirect users to potentially harmful content, possibly for SEO spam 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=ancient+civilizations+and+ruins+of+turkey+pdf
    • http://files.meganmurphy.co.nz/uploads/1/3/1/6/131606984/07a94ae.pdf
    • http://files.chaamrealty.net/uploads/1/3/0/7/130776401/karasa_vuvuvun.pdf
    • http://files.walterdehavilland.com/uploads/1/3/1/4/131437619/pesazebik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/git_create_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/hot_springs_jetsetter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9108/1882/files/mujedakizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/78694406770.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/sefopafunaguxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/48083863146.pdf
    • https://cdn.shopify.com/s/files/1/0445/8368/2212/files/ansi_150_flange_dimensions_in_mm.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/mesalidex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/monezenogimobapotado.pdf
    • https://cdn.shopify.com/s/files/1/0429/5619/3955/files/xizaferinipogofivaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/45584170340.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_off000042df.bin
532fd033062831d6c0a55bad9ea5a7c68ad205440a2914ac13abda59d3419398
pdf-font-stream PDF embedded font (sfnt) at offset 0x42DF 5416 bytes
font_01_sfnt_off00005572.bin
e5d5e0169b118ed86b72fc556672a1637a55d0dfbc56a724ec7b2370f93472a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5572 9660 bytes