Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba7269945199919…

MALICIOUS

PDF

33.8 KB Created: 2020-08-20 01:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d182af71d7908900bee9e20eae9152c SHA-1: b434670d6fb590a8abb73e65111a695f9c2685f4 SHA-256: 5ba726994519991913972e76845db495d76983c0d09dc66bb098149ec48b6bbf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same malicious URL and other URLs that appear to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicates malicious intent.

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=chambal+kannada+movie++hd
    • http://vafap.bizkidz.us/uploads/1/3/0/9/130969858/1491481b5edf3e.pdf
    • http://files.jayandersonbass.com/uploads/1/3/0/7/130776003/zovavumifabo_nokepowelor.pdf
    • http://files.minerallitmag.com/uploads/1/3/1/8/131872298/4667011.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/wipovonapefirifuliv.pdf
    • https://cdn.shopify.com/s/files/1/0438/2700/3549/files/ant_colony_optimization_and_swarm_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/30470357893.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4487/files/dreamboxedit_para_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/77230935902.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/puperefud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/73037555550.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6901/files/tosajev.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/23373183251.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/hess_s_law_extra_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/pozavikagidokuger.pdf
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/gitubujasugo.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_off000048b6.bin
2af087cb4765a4aec2f460a54c2205dbbeb659512009b92db066fc702ff99093
pdf-font-stream PDF embedded font (sfnt) at offset 0x48B6 4960 bytes
font_01_sfnt_off0000597c.bin
ac29c20a98f195ef58e4b44599f3fb69d39c565492cf1ea20f907194df7d1e52
pdf-font-stream PDF embedded font (sfnt) at offset 0x597C 9680 bytes