Malicious PDF — malware analysis report

Static analysis result for SHA-256 4948d1277a35d175…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 04:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8e4af85f51caf2da224d89b678b1c25 SHA-1: d161be966ca38430c295a3c327dfce5949e82833 SHA-256: 4948d1277a35d1751ad3a2779c9db46fdf7034027bb06b8aa82009df753d50cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=t%25C3%25BCrev+te%25C4%259Fet+denklemi'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs, suggesting a coordinated effort for SEO poisoning or traffic generation. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to malicious infrastructure via embedded 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.me/wix?keyword=t%25C3%25BCrev+te%25C4%259Fet+denklemi
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/cauplas_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/beowulf_summary_and_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0445/6411/9716/files/39659124085.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/whiz_tv_breaking_news.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/komplikasi_abortus_imminens.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/mac-_address_vendor_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/fmea_report_for_go_kart.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/matemticas_avanzadas_para_ingenier.pdf
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/81202108535.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/ccdc_21.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/47770431748.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006232.bin
1ff7a4e4e83b52c24ab52160397a7de49f671456b02ac8ba28611591f70ce47c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 6312 bytes
font_01_sfnt_off0000778c.bin
b8e0fa065c85d494f560e86a494c3efbc838ef2756606165a3b33533b1fe642b
pdf-font-stream PDF embedded font (sfnt) at offset 0x778C 5008 bytes
font_02_sfnt_off00008851.bin
4efc71620713b34232052f7cd1298b0ca0b15843998e2bccf0c3361da66ab9a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 12716 bytes