Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eeb4b08719772c0…

MALICIOUS

PDF

51.5 KB Created: 2020-08-06 13:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5fc968f655a9c2ed775766867feef68 SHA-1: 5e8876e7035cf90092badb372bd7d9983968ca07 SHA-256: 7eeb4b08719772c05429bd906fdc8b6e9c5f5857427d2cbac552983e3e049f9a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially garbled, includes text related to 'Apc ups 2200 manual' and a URL that appears to be part of a link farm, suggesting a lure to distribute malicious content or phish for information. The ML classifier strongly flagged this PDF as malicious.

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=apc%20ups%202200%20manual
    • http://files.jademusicschool.co.uk/uploads/1/3/2/6/132681443/vumix_xofaxinavir_bolapoga_gesule.pdf
    • http://files.inspirenortheastwisconsin.org/uploads/1/3/1/0/131070035/cd88da20b.pdf
    • http://files.workingdogschool.com/uploads/1/3/1/3/131379296/lexatuxor.pdf
    • http://files.tainjio.com/uploads/1/3/0/8/130874612/vusikimefaruxego.pdf
    • http://files.coastalcaringclowns.com/uploads/1/3/1/4/131406437/zorazavete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/46266688325.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/daburekutizegamabuvijege.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/financial_management_theory_practice_15th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuvororixepexovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/xixokijegudolexazeri.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/tirusidupofanebaroninivav.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/66032040428.pdf
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/rebulujoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35403674757.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/5655017925.pdf
    • https://cdn.shopify.com/s/files/1/0445/6172/7647/files/google_angular_cdn.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/mabufadapebanasobofoliv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/veritizupinusezobikaniju.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_off000087cf.bin
e00c99c49ce0ae83b3ab09fdbd758d9bd20505c88dfef2d2b4ffed957a4a89c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87CF 5248 bytes
font_01_sfnt_off0000999d.bin
5b12541d70c56216a5c2ea4ef2b67fe88137f0ee56246d4334d591b081593b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999D 12044 bytes

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