Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1fd69094043a12…

MALICIOUS

PDF

35.7 KB Created: 2020-08-14 17:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c550e514c1038d9d9c1627be258f65bf SHA-1: 74faa4f465278d7a8f56d297b99f1b86451e8965 SHA-256: fb1fd69094043a12b3b48b0bae1cf56c2cc684855a641171e2b0bba8c3069b4c
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 of which point to external PDF files hosted on various domains, including Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=aruba+road+map+pdf', is identified as a known malicious redirector. This suggests a tactic of directing users to potentially malicious content or phishing sites under the guise of providing documents. The ML classifier also strongly indicated maliciousness.

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=aruba+road+map+pdf
    • http://files.silverwearbyjason.com/uploads/1/3/0/7/130775320/2817666.pdf
    • http://makufi.rb-tactical.com/uploads/1/3/2/8/132814930/zemagijox-gozolodetali-xulake.pdf
    • http://files.holisticimpactfoundation.org/uploads/1/3/1/3/131398253/fivebib.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/1st_year_biology_book_download_sindh_board.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/leloneliropakozekuboveji.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/calisto_y_melibea.pdf
    • https://cdn.shopify.com/s/files/1/0429/9148/5091/files/38157869889.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/24264899494.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/32066616196.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/homelite_textron_chainsaw_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1463/files/zejaderatumafefoxujapis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/tezenelilegadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/30091959568.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_off00004df2.bin
ece52ea2c80d69a3c0aaccf76fd691f379b4543642d84fe02c390bcc34a55ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF2 5104 bytes
font_01_sfnt_off00005f2c.bin
e586af0b7e03ea24b6edf17a43f74dcd6a34f8da90d6c3f1f18097dbe3eec5b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 10396 bytes