Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6c28ab779ee4b8…

MALICIOUS

PDF

35.1 KB Created: 2020-08-08 06:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a78beb8b7cc3349e1ce55115563395d SHA-1: 12e796a9a7e530f7f6816dfbb7e284e47acc7f6a SHA-256: 0e6c28ab779ee4b89128e292095aecdf14da7cb4014335c6cde2027fc699a4ab
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a document about synonyms and antonyms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of numerous external links, many pointing to potentially malicious domains, strongly indicate a phishing or redirection attempt. While no scripts were extracted, the document body itself contains the malicious URL, suggesting a direct lure.

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=kiran+prakashan+synonyms+and+antonyms+pdf
    • http://files.northernsmokers.com/uploads/1/3/1/4/131455832/nojimurupud_zotofup.pdf
    • http://dikibi.carassecretfarm.net/uploads/1/3/2/3/132303382/e85aee15fb.pdf
    • http://files.jkmusicstudio.com/uploads/1/3/1/0/131070895/bitudaj.pdf
    • http://turane.donwilsonodhiambo.com/uploads/1/3/1/6/131606349/wapelinupik-bobuzoxupep-wusidad-luzowelab.pdf
    • http://panazi.211yolocounty.com/uploads/1/3/0/9/130969723/pujuxugame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/difference_between_distributed_system_and_centralized_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/mivinawogutalolulado.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/928643641.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/vazobumafesolel.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3475/files/bevalij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/52667068655.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/worutusaxuwuwuniwazarom.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/24384566480.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0409/files/59751219930.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/sumem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/fopetesaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/31741376959.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_off00004a8e.bin
6c5daef73befa086c5ddd6702ae3a923d3941e605ff7abcc1e9e9822d7aafa8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8E 5384 bytes
font_01_sfnt_off00005cbb.bin
a9796a8603b1d6dd8f57980af3f76e6d08f9206fa15e3627bf2b3bdf8b2109c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBB 10192 bytes

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