Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d03b412abcfd47…

MALICIOUS

PDF

48.7 KB Created: 2020-08-28 05:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e776155f601fcb89d9b2f4ccd1a02c SHA-1: b13e51f50073bf81506ac4674f5811d269286b8a SHA-256: 96d03b412abcfd47ed6a69a19e56bc6bbed53b00c7569478801c1409833394c9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary goal is to redirect the user to malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious activity.

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.cc/pify?keyword=wondershoe+instagram+quotes
    • http://suxolazo.glwdelivery.com/uploads/1/3/1/4/131454012/purisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/mercury_outboard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2918/files/44046389618.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/gigukojiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/very_funny_jokes_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/romelogagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/57748070301.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0901/files/fuxisiwanirekatenagoweba.pdf
    • https://cdn.shopify.com/s/files/1/0434/1606/0061/files/tizedutururafusopuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/76243103573.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/revejemunujajokamadagewig.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/35324285433.pdf
    • https://cdn.shopify.com/s/files/1/0463/3070/8129/files/zigemelukosikitodunevewo.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/
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fb0.bin
c7d343f75ecb3eae515f64f0b9f8f022af84724f61c6152f214b683fb3266021
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB0 5348 bytes
font_01_sfnt_off000091b6.bin
e5e159af0c18f4d7cbb35eb387124346721731a1dbe3c69013f7027f40961602
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B6 10512 bytes