Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82280991ba85448…

MALICIOUS

PDF

39.1 KB Created: 2020-08-12 01:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d101f634f0b3eb21883ca9c51b36528 SHA-1: a8f5f460c80b3cd205316b1eb2630a3898eede10 SHA-256: e82280991ba85448f70911b378c6369433592930b9263c2b50bf35eb79b8c744
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users to external resources, with one critical link redirecting to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that is also present in the heuristic firings. The primary attack vector appears to be social engineering via a deceptive link, leading to a malicious redirector.

Heuristics 3

  • 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.
  • 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=authentic+assessment+for+english+language+learners+o+malley+pdf
    • http://files.thujar.ca/uploads/1/3/1/3/131382841/duzapoguwil_tepefujiko.pdf
    • http://dawusug.sashawrighttherapy.com/uploads/1/3/1/4/131438474/e6c456.pdf
    • http://files.jackblairgray.com/uploads/1/3/1/3/131384018/eede518175.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/zuvegowexibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/lawogozubawiguzil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/73039918122.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6833/files/45294688049.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/que_es_preeclampsia_y_eclampsia.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/vasutuvotowoba.pdf
    • https://cdn.shopify.com/s/files/1/0435/6335/2227/files/52666877013.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/4621014329.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/vezitotidugufumibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/napax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/24794245867.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/50889024799.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/tabalaganobobel.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/45263795183.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_off000059bc.bin
3deca11f60299a4b0a8252249b2e445548b7c72d66e99f13e067d96836fc9644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BC 5660 bytes
font_01_sfnt_off00006cd4.bin
346d5224de00ae76d70bcc9b624c60af4ec3ce6d6bd67126ced57a61f0cab0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD4 9992 bytes

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