Malicious PDF — malware analysis report

Static analysis result for SHA-256 6252af84eca3ec89…

MALICIOUS

PDF

46.5 KB Created: 2020-07-17 14:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4043a212cf80e45ba1d5bfa4a858a47b SHA-1: 33763642d185b42e9b3212f0d0391d6b14b08074 SHA-256: 6252af84eca3ec89b1bab154b038adb762e9eaf3e2160dae8efbc677bddac0bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Urology textbooks pdf'. The ML classifier strongly indicates maliciousness, and the presence of a redirector points towards a phishing or malware distribution attempt.

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/wb?keyword=urology%20textbooks%20pdf
    • http://files.kurznachzehn.com/uploads/1/3/1/6/131606758/xomes.pdf
    • http://files.ebfbla.com/uploads/1/3/1/8/131871467/ba9bac1457dac9.pdf
    • http://files.patrickdeanhubbell.com/uploads/1/3/2/8/132815172/biburira-favinoxifilelo-nunogaviw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pomedefasef.files.wordpress.com/2020/06/18014309340.pdf
    • https://xatekenan.files.wordpress.com/2020/07/84251631375.pdf
    • https://turepiw.files.wordpress.com/2020/07/jurus.pdf
    • https://ganotibav.files.wordpress.com/2020/07/zitun.pdf
    • https://sexedituf.files.wordpress.com/2020/06/94604070290.pdf
    • https://taribifu15544649.files.wordpress.com/2020/07/wadewejivewimo.pdf
    • https://lobovesop.files.wordpress.com/2020/06/timojira.pdf
    • https://zadedow817229965.files.wordpress.com/2020/06/rajodusufinulibovurupela.pdf
    • https://badibiref.files.wordpress.com/2020/07/57291032390.pdf
    • https://lawedalegepe.files.wordpress.com/2020/06/bubajezejupudipoledewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/29411812682.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/debebed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/28052407939.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/47109433742.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/59981788403.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/xusibopuweledivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/6434236562.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/vujibizapimosamodevipizu.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_off0000795c.bin
e9e88c47a7213e1629aa167a7d962c103a1e42743dcc78ff609e95f7f6643822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 4996 bytes
font_01_sfnt_off00008a7e.bin
bd88d0a387bbfeae8e11b2420a786500225a30adb9bad97726367d055ae23bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7E 9816 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.