Malicious PDF — malware analysis report

Static analysis result for SHA-256 777557ee6419bb20…

MALICIOUS

PDF

82.6 KB Created: 2020-07-31 23:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213a25006323d54b46d2c40706c2cdc7 SHA-1: 5a960df4d646095203cb4bce4bb0c2fe5d19504b SHA-256: 777557ee6419bb2069e84c3796ddcca0f4883e154e1a6239bf0d96a27480e5e7
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into changing payment details. The presence of a malicious redirector URL suggests an attempt to lead the user to a site that could host phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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/pify?keyword=add+article+developed+by+hutbazar
    • http://files.littlemenaceclothing.co.uk/uploads/1/3/1/8/131858975/kegexev.pdf
    • http://files.pokornychiropracticclinicsd.com/uploads/1/3/1/0/131071231/sobobofavaza.pdf
    • http://files.blackbeltacademyfortpayne.com/uploads/1/3/0/9/130969402/7322942.pdf
    • http://files.budbarnyelm.com/uploads/1/3/1/8/131856769/ca663ab85d6.pdf
    • http://files.cupidsinspirationuk.com/uploads/1/3/1/3/131381640/juxuvokop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/gafalanexoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/2448856408.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/xedesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/76913920344.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/87994966851.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/gipafi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/zililutifevofuximufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/peguxuvuzizazitubinakoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/93061329652.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/18345314566.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/naxinisetejiredomox.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/nuputumobagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8097/3477/files/pixuvimufivajamegavaf.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_off0000fbc0.bin
f662860c066dd2da7f9195574b983915017eb1f245c86ec38f748043d6c366b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 5324 bytes
font_01_sfnt_off00010de6.bin
545c9324044cbe1b7f3193341bd48623bfcc5b1ad9de5ef8617b24cac9e9643b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE6 15040 bytes

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