Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50a89859b49e61c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-23 10:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ac3e010d9a271f1cb38ba6f182d94ab SHA-1: 024774a08e72a30d2661bd0997df3d4ad116ed03 SHA-256: a50a89859b49e61c3d6e4277626bac8432cb805794e526361a6ca08e0f1b65f9
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious URL, ttraff.ru, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains the string 'New hd movies tamilrockers' and the malicious URL, suggesting a lure to pirated content that redirects to malicious infrastructure. 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.ru/pify?keyword=new+hd+movies++tamilrockers
    • http://jewimas.shopbelieveboutique.com/uploads/1/3/0/9/130969352/ab5d396.pdf
    • http://gepopes.kristinfurbeck.com/uploads/1/3/1/4/131453150/c502d5da1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/fe_civil_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4760/7720/files/21423951208.pdf
    • https://cdn.shopify.com/s/files/1/0461/6129/7560/files/wowitepugiku.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/dreamtech_core_java_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/92100372349.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/metode_blotter_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/davesebilatesebul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/33428909790.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7707/files/braindumps_aws.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/11514671514.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_off000063b0.bin
ba1737940e91bd0f26cd3f395a9d62f3b48a483f287f142b07b08c58b88481a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 5048 bytes
font_01_sfnt_off000074ef.bin
a77b65088dc0a19125c662ea7f03d372eb6a5f298be8e2bbb18a1f2993268c8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74EF 11108 bytes
font_02_sfnt_off00009917.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9917 4324 bytes