Malicious PDF — malware analysis report

Static analysis result for SHA-256 0863182ab9a451ed…

MALICIOUS

PDF

41.1 KB Created: 2020-08-22 17:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b974ceba896a598253bb57b1928db9 SHA-1: cd22a7536fef07264ad3b7bb517147b67ecdbe06 SHA-256: 0863182ab9a451edb0eb2585f939500790d78407b0e44dcb47cdfaad76957513
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lure users to malicious sites, likely as part of a phishing or scam campaign.

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/pify?keyword=alternative+investments+caia+pdf
    • http://files.celioarts.com/uploads/1/3/0/8/130873922/9886756.pdf
    • http://woxon.journeyandbloomyogadoula.com/uploads/1/3/1/3/131383664/jemezenivuroratod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/17139041588.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/14760467229.pdf
    • https://cdn.shopify.com/s/files/1/0438/3470/4034/files/jdk-_8u221-_windows-_x64._exe.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/bamupitinuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/lizasud.pdf
    • https://cdn.shopify.com/s/files/1/0435/0623/7604/files/keto_diet_plan_uk_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/33646078120.pdf
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/loctite_263_tds.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/fight_list_answers_oreo_flavors.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesibilefonupas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/online_payment_form_template_html_free.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_off00006088.bin
3a8a0b66b742fad2bf31d17ad52bbf33b08c7cd3268c7172aeb416bb57fb41d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 5352 bytes
font_01_sfnt_off000072a1.bin
d8dc0558f1decb37f2e216af19d91c8e144aae1087e6bbb76a8d278d1246745d
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 10984 bytes