Malicious PDF — malware analysis report

Static analysis result for SHA-256 403068e71f1c261b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 00:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168c1a577370eb13fed8255c7edbe863 SHA-1: d6f43ba170b50bcb125f611f34215714bfcf64e5 SHA-256: 403068e71f1c261b9e87cbbb0134476037af404296a5b457ff76196fa4f2b0cc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm strategy to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to harmful sites.

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=liftarens+guide+till+galaxen+handduksdagen
    • http://xolidikol.tracygrammer.com/uploads/1/3/1/4/131453960/2566f6969680.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/94981619704.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/61128460607.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/mario_bro_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/papemede.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/body_systems_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/windows_10_change_network_to_private.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/zixomode.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7430/files/medical_term.pdf
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/nursing_physical_examination_and_health_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/boxasakofasofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/gentle_chair_yoga_for_seniors.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/bedingte_formatierung_excel_2010_mit_mehreren_bedingungen.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_off000062c6.bin
0cea3a9df10e1dc7e7e523e86d307e7e1c6f226a09767c082c62d9c60ead8c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C6 5244 bytes
font_01_sfnt_off00007491.bin
bf284946891db0f37199f769f184e129fef9d9efab9d5eeaa72e701a93824508
pdf-font-stream PDF embedded font (sfnt) at offset 0x7491 10084 bytes