Malicious PDF — malware analysis report

Static analysis result for SHA-256 417535e752f2a8a1…

MALICIOUS

PDF

49.6 KB Created: 2020-08-01 15:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 093b321a1e0b3314f409b5bfd253bb9c SHA-1: 345f78bcac785f82b7cb783dbbe0667869531a8d SHA-256: 417535e752f2a8a189da3f46d1558f6afd8b0095791a18f38509983fadff3bdd
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure and for containing a mass external PDF link farm. The embedded URL 'https://ttraff.cc/pify?keyword=bash+global+variable' is a strong indicator of malicious intent, likely serving as a gateway to further malicious content. The presence of numerous links, many pointing to shopify.com domains with numeric slugs, suggests an attempt to create a large, distributed network for hosting malicious files or phishing pages.

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=bash+global+variable
    • http://files.gortletteragh.net/uploads/1/3/1/3/131380343/pijitugafidaxosituta.pdf
    • http://files.dungeonsanddecorations.com/uploads/1/3/1/3/131379012/efcc19d43a5ea43.pdf
    • http://files.goldenbambootaichi.com/uploads/1/3/1/4/131437064/1246015.pdf
    • http://files.glassartenergy.org/uploads/1/3/0/7/130739831/3531672.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/92634156739.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/zabaxuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/belekeribonug.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/93378814203.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/11967480897.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1416/files/vetukefugukadorufigugupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/sepiloxuxezufemi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/jowemamutexus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/39871599892.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/luwasiful.pdf
    • https://cdn.shopify.com/s/files/1/0438/4600/8982/files/reinstall_npm_mac.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_off00007bca.bin
9d8b557d7cfe149f8af5671e6b3c507eee7ae91a5ac31798aeb00bdd890885ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCA 5196 bytes
font_01_sfnt_off00008d7d.bin
bdd46477b3ad22741d779f4aa3a2e0b4e04e4fec62c990828e818a92572c2568
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7D 14192 bytes