Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffa0e2dea0d8ff3…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 10:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 124a895432a9f289c76a8527331b8902 SHA-1: ad3f7e59910b6e81887abfe9bf769169f8d139a6 SHA-256: 5ffa0e2dea0d8ff3f2173b8dda5fb40a0a655c5ce6d99b00a3ac0b54146ebe92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector. The document also hosts a large number of external PDF links, many pointing to Shopify, likely as a tactic to obscure malicious activity. The primary malicious URL is https://ttraff.cc/wix?keyword=formato+place+de+enfermeria.

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/wix?keyword=formato+place+de+enfermeria
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/mcmaster_carr_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/38288076440.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/81767219750.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/rabol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bojakotipizijogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/zasewuju.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/server_2012_keys.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/android_setup_wizard_disable.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/xefakusegubosuzerape.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/84583669035.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/dogabisaxumamojajolupab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/benami_transactions_prohibition_act_1988_bare_act.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005905.bin
d5643cb78e20a68784fabb23be593116d4b025884053a6029cd5222b6a07b67f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5905 4868 bytes
font_01_sfnt_off0000696c.bin
dbd9b5690022c8f796cf12c7a7ec014cc666b718c86f2ee4e923d38dc1b39a76
pdf-font-stream PDF embedded font (sfnt) at offset 0x696C 10160 bytes
font_02_sfnt_off00008bea.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEA 4324 bytes