Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ca6e509fb7e454…

MALICIOUS

PDF

37.2 KB Created: 2020-07-15 05:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352049d769700c6888d8894be1951ace SHA-1: c3ebe37dfbdc4dbaefd91b94e1fe78e0c1bd8a09 SHA-256: 79ca6e509fb7e454dd7f2837b0dcf4961ef0e8d01a642d0067fe3e59d51796c9
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body text suggests a lure related to a 'Native Instruments M32 manual', likely to entice clicks on the malicious redirector.

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.com/wb?keyword=native%20instruments%20m32%20manual
    • http://files.mrizzo1964.com/uploads/1/3/0/9/130969600/d3f88a1c3.pdf
    • http://files.borninabarnminiatures.com/uploads/1/3/1/1/131164157/d7f3daf101da380.pdf
    • http://files.wlacgallegos.com/uploads/1/3/0/8/130874350/dogapozureni_magiraduw_wegifuwokaxafi_takuxeruwow.pdf
    • http://files.wlacgal
    • https://zomifedig.files.wordpress.com/2020/07/63885111664.pdf
    • https://rurilaxun.files.wordpress.com/2020/07/1162211219.pdf
    • https://vefevomite.files.wordpress.com/2020/06/66644256443.pdf
    • https://garuwade.files.wordpress.com/2020/07/tadopojilosanebikoponix.pdf
    • https://xejolaxutibu.files.wordpress.com/2020/07/45623108324.pdf
    • https://nolomijavugi.files.wordpress.com/2020/07/bosutulizaxojebu.pdf
    • https://nuxibigov.files.wordpress.com/2020/07/23398774985.pdf
    • https://somurumamuge775260414.files.wordpress.com/2020/06/nuxofokamabagezo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/xanuduzosivixavosisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/wixilutekedovibukimujudij.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/nibumew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/68725166861.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/tozizerazogadawazisesevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/45998102543.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_off00005719.bin
c07bd0752eeeb4b3be3972815dfbdb2e8b38eb50f4fc55d88072bb59075d7512
pdf-font-stream PDF embedded font (sfnt) at offset 0x5719 4928 bytes
font_01_sfnt_off000067b8.bin
79a76b65e1f6aa265bad217ad5281cfc092150a26d0b89fc564cc434a079328a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B8 9412 bytes