Malicious PDF — malware analysis report

Static analysis result for SHA-256 7247eaf87cd27cf2…

MALICIOUS

PDF

39.0 KB Created: 2020-08-31 01:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6ca2c5db3653f87e0905f136246887d SHA-1: 615d3e8128fcbd8c174a91713c91eb4f063bef37 SHA-256: 7247eaf87cd27cf286b4c55f59b0e6388f88a3143327e68149e97a146b0babca
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious sites. The document body, though heavily obfuscated, contains the same URL and appears to be a link farm intended to generate traffic and potentially disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=paradise+golf+course+utah
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2f3ac6_7cc66a505a0a4f85a4a2bbb148d7a5ee.pdf
    • https://static.usrfiles.com/ugd/353d00_073020eb228845bd852aa678541ff377.pdf
    • https://static.usrfiles.com/ugd/a1fb72_c204536905894d7f8f718461b27b45f1.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/58284811235.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/packet_tracer_8.1.2.5.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/tedosogojebavakafum.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/tidubaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/0386/9346/files/cytology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/bmw_advanced_battery_charging_system_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/40844214560.pdf
    • https://cdn.shopify.com/s/files/1/0437/3472/8853/files/kenmore_elite_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/casting_process_defects.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/37991758172.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_off000057da.bin
4c052d1e570368b295f107ddb044b621aba5dbd34465ed5aaffa7c17ab9c705b
pdf-font-stream PDF embedded font (sfnt) at offset 0x57DA 5284 bytes
font_01_sfnt_off000069c0.bin
596c88d5632e74655c2f7a952b75c47d14b1ce1b1ce858117441fc5bdb426153
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 10992 bytes