Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b2e335ba2b53e8…

MALICIOUS

PDF

48.5 KB Created: 2020-08-14 23:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e84acd73eb8a3bc2cd1fc23fac6bba SHA-1: 6af71c89b78fa79beac021a36385cf8b5f881b0f SHA-256: 13b2e335ba2b53e8c5763254e7eb59759c958874ead9ea8beb287a5a703ab8fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure to install a browser extension or update, which is a common social-engineering tactic. It embeds a link that redirects to malicious infrastructure, indicating an attempt to deliver a payload or phish credentials. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=tft+team+comps+guide
    • http://ponow.kottagekennels.com/uploads/1/3/0/8/130814328/3397559.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/50910294813.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/xubenorutorafigufalobazos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/vipirifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/kvs_biodata_form_for_interview_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/2016201311.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/becoming_a_better_me.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/tusun.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/luganda_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/91555876823.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/95612516019.pdf
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/penetration_testing_methodology.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_off00008036.bin
7c8f3d13ec509fe2b17fd8491f7411773c02ccb84edb6747942c65742fd54fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8036 5296 bytes
font_01_sfnt_off0000922a.bin
5898f4683bf31bafc7053475bf2acfc0e63529fb9bc46a2e33f35b982350d1c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x922A 10364 bytes