Malicious PDF — malware analysis report

Static analysis result for SHA-256 76cd0ecd2f64ec8d…

MALICIOUS

PDF

36.4 KB Created: 2020-08-11 09:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a224def425c7053e8ee18b85a6fecfbc SHA-1: 6ca41466009713f1b68e0962809df0d8456e1ad0 SHA-256: 76cd0ecd2f64ec8d37343fcf511d4eba5936f21b7027ea29dd7ca0526855b5eb
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text "Sprawdzian atmosfera oblicza geografii zakres rozszerzony pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=sprawdzian+atmosfera+oblicza+geografii+zakres+rozszerzony+pdf
    • http://files.swampscottfootball.com/uploads/1/3/1/6/131606431/xasewubisopesetonite.pdf
    • http://baxabiz.jacintaviolin.com/uploads/1/3/1/4/131437402/9437301.pdf
    • http://penizili.robicheauxart.com/uploads/1/3/2/7/132710712/7204243.pdf
    • http://files.hollingsworthlumber.com/uploads/1/3/1/3/131398360/0b365aff8b.pdf
    • http://dupojir.jmossart.com/uploads/1/3/2/8/132814930/dusumuzotataj_jebevide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/23273239794.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/2nd_law_of_thermodynamics_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/minecraft_pe_0._12._0_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/jolly_phonics_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/batman_the_killing_joke_trke.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/digital_marketing_assistant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/vixoneweduzefeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/kubop.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/93507851875.pdf
    • https://cdn.shopify.com/s/files/1/0428/9150/9919/files/likaki.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_off00004ac5.bin
d101642651da33a854d982708047a92174c708ae4bfe2dfd567a40da0095857f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC5 6024 bytes
font_01_sfnt_off00005f49.bin
ce384c414560297118783703b6bc1ef20f84a0f5c8d04f783e0f5e7bca05270f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F49 11300 bytes

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