Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69d5e058b6ad8b8…

MALICIOUS

PDF

44.9 KB Created: 2020-08-15 08:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f8ff11ae69db4997bc184815722f7c SHA-1: 946c3c15f4dcec12e0b712db99b6f7e495135ee2 SHA-256: e69d5e058b6ad8b876141651acccd3af0149e61643c96549e342601bb81dd39b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to movie downloads, suggesting a lure to entice users to click the malicious 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.com/pify?keyword=aaru+movie+video+song++masstamilan
    • http://dafezalu.gccmustangs.com/uploads/1/3/1/6/131637136/gojamusod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/22755879431.pdf
    • https://cdn.shopify.com/s/files/1/0430/4764/9429/files/ffxiv_macro_commands.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/imprimir_caderno_de_caligrafia.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/97375993954.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/cisco_nexus_9500_fabric_module_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/bosel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/xiguzanuxejutusagax.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/linux_bash_scripting_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/binasakotovap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/8940605790.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/36417906214.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/above_all_chords_g.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/oxford_textbook_of_oncology_download.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ea.bin
148605fcc04334b6cbe6d6d72d3dc7810a11de596b23abe4f5e8f827257fefd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 5196 bytes
font_01_sfnt_off00008480.bin
bf6a1c3c6cec30c890069e4228a863c8d080a52593f6d546c100a0d5c22f3c9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 9864 bytes