Malicious PDF — malware analysis report

Static analysis result for SHA-256 f378573d6b1b7cce…

MALICIOUS

PDF

38.2 KB Created: 2020-07-14 22:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f29785155412ac7926a963bf5ebf4c08 SHA-1: 7eadf0b1e880e06909a9e73e740d738a41147ad2 SHA-256: f378573d6b1b7cce64df33a15678722531de860132e30f6cb6c43a64a54d0841
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, identified as a link farm, designed to redirect users to external sites. One of these links points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern is the distribution of malicious 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.ru/wb?keyword=la%20vie%20en%20rose%20spartito%20piano%20pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://files.chrisdawphotography.co.uk/uploads/1/3/0/8/130873828/8941567.pdf
    • http://files.djdurt.org/uploads/1/3/1/4/131453354/narituligedegofen.pdf
    • http://files.keirablackwood.com/uploads/1/3/0/7/130739131/gosixuruxeve_nasenonijoba_nibaranokusine_jomuzeluxabe.pdf
    • http://files.myearthbistro.com/uploads/1/3/0/8/130814227/f4fc16.pdf
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • http://files.insideoutoutdoors.com/uploads/1/3/0/7/130738915/57ecf77b3d47.pdf
    • https://nimixiza
    • https://nimixizagide.files.wordpress.com/2020/07/3715251862.pdf
    • https://kikivolepo.files.wordpress.com/2020/07/vexunorudorobabux.pdf
    • https://zenusunadaxo.files.wordpress.com/2020/06/7355967845.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/31678013365.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/80812563809.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/21653951615.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/42513124628.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15900382268.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/xuluje.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/25021868585.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/43050382494.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_off0000595a.bin
9841e0ffe787a846d25f0521d709206e65d1023d02fc0e1ddf5794c4bccade6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595A 4792 bytes
font_01_sfnt_off000069b7.bin
08ef2e26a04fecd0abbbe1b25d563e82a47f41bc0804bfb608446065f3130c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B7 9820 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.