Malicious PDF — malware analysis report

Static analysis result for SHA-256 7176376fbc808521…

MALICIOUS

PDF

40.7 KB Created: 2020-08-07 08:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85b1d9641b53845ea861faf97f54c0d9 SHA-1: ce8ffe9df9197dfcbd8caec8dc0396ee22ff8fca SHA-256: 7176376fbc808521a5e910354769618e17b955c63fa1c4356fbd8b02ed5cb94c
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious domain, masquerading as an IPL 2020 match schedule download. This is supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The document body, though heavily obfuscated, contains the same lure URL.

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.com/pify?keyword=ipl+2020+match+schedule+pdf+file+download
    • http://files.bhamorthopedicacupuncture.com/uploads/1/3/1/4/131452799/jojipopig_xuwivotow_natatizaxemu_lalefetesarorut.pdf
    • http://files.laromas2go.ca/uploads/1/3/1/4/131453177/bixurusagafew_tizas_wevuwawajutuwa_rasotopaze.pdf
    • http://files.varietymesh.com/uploads/1/3/1/6/131606198/547a6637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/57966219853.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/27274625637.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/55613740849.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/99182824954.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/34273599149.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/60902261708.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/nuneladuderemapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/33434034289.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/sugavonexixaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/59639283227.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/wubeloxodofuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/baraxeliretavujejanoxel.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_off00006087.bin
5885fa6b25ac0c0346e995e87192f68f5a0431a787c3d339ae6016d7df483568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 5604 bytes
font_01_sfnt_off00007387.bin
840a527374a0265bfbfae84791316d5c6e363dd830145b3a65fe2c9c13bedb6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10020 bytes

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