Malicious PDF — malware analysis report

Static analysis result for SHA-256 562dc1d288dd4960…

MALICIOUS

PDF

38.1 KB Created: 2020-08-20 13:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2998871ee0ff1d441e8f7c270770ce42 SHA-1: 9224471fab074d30ecb0e61d0acd9046f9a9bed9 SHA-256: 562dc1d288dd496032125f31497a087822ca7b7cb2b9aef05d730cf679e4d20d
154 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 pointing to Shopify-hosted PDF files, indicating a link farm. One of the primary links redirects through 'ttraff.com', a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the same redirect URL, suggesting the primary purpose is to lure users to malicious infrastructure.

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=rim+jhim+badal+barse+song
    • http://files.biblereadingmarathon.org/uploads/1/3/0/7/130775084/6f8722e27.pdf
    • http://goruzomik.doresangha.com/uploads/1/3/1/3/131382257/4354876.pdf
    • http://diwogom.preserveschoettler.com/uploads/1/3/1/4/131453540/lixiweduk-dobisilero-kibofa-digozezagu.pdf
    • http://files.allornothingnutrition.co.uk/uploads/1/3/0/7/130775795/filamukigir.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/vosex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/nebuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/business_school_book_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/va_form_21-_0845.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/rurajemajodosup.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/free_resume_builder_cv_maker_templates_formats.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0560/files/64517119943.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/seponajogapoxisejesusag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/bavowudokudapotut.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0983/files/adverbs_of_manner_exercises_2_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/42573119861.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_off000049ce.bin
b9132f57dcbd764887b16b2b186a27c55dd137fefb03b2484efba489c2db21bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x49CE 5464 bytes
font_01_sfnt_off00005c3b.bin
dc3f1998b0c3d95fe79f1912a280928a780b5d8497253e5e6e8844e8c612b9f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3B 14412 bytes