Malicious PDF — malware analysis report

Static analysis result for SHA-256 022dca83ccc9d7ab…

MALICIOUS

PDF

38.5 KB Created: 2020-08-06 18:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9422e68f6495f670fe9cb84fb19fb80 SHA-1: e74b03849f7fb399200f17f47523ad1553cb4515 SHA-256: 022dca83ccc9d7ab5322626655f44f9f9e9edc069e7b8da053cbba34049e6715
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is identified as malicious. While the document body contains text related to physics formulas, this is likely a lure to disguise the malicious intent of the embedded links.

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.ru/pify?keyword=movimiento+uniformemente+acelerado+formulas+pdf
    • http://files.phoenixvillexc.com/uploads/1/3/1/4/131453132/dazanixafeb-wolawafomil-fuzigirobiruvi-masotoxo.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/2/7/132740204/bd650f3ea617.pdf
    • http://files.zpcreatewithnature.com/uploads/1/3/0/8/130873728/fisazipekewo-ranimawarujesen.pdf
    • http://files.hooktownholidays.org/uploads/1/3/0/8/130814467/rosinowowiga-romipogi-wamati.pdf
    • http://files.margatedm.co.uk/uploads/1/3/1/3/131398145/0eb9f7d75cd609.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/2001_yamaha_v_star_650.pdf
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/54549166520.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/vigaso.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/kuboraxojamomuxadel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/41293000945.pdf
    • https://cdn.shopify.com/s/files/1/0443/6580/7772/files/roman_catholicism_loraine_boettner.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/zadejixidewaluxagide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/84088541112.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/air_pollution_control_a_design_approach.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/sojilas.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_off00005342.bin
30af1888f281fad083eafe8958eade43d982cacf703df576716ff4b547b5d0d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5342 5368 bytes
font_01_sfnt_off00006580.bin
0c0e2533cd870c11188321f749ea11b890d2d1895bd330b9270e6d542b2d2452
pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 11676 bytes