Malicious PDF — malware analysis report

Static analysis result for SHA-256 7197684fcf57be0d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 10:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1695977c5289b4fa23ec08c8abd7cc86 SHA-1: ecf60c966492e5ce3cd83ba0f4f1206085cde48c SHA-256: 7197684fcf57be0d06e5ee09fc9be32029b01a5ae5b2a377eb535ef8599f2407
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=autodesk+dwg+trueview+2014+tutorial+pdf
    • http://files.salmansoz.com/uploads/1/3/1/6/131606984/2569171.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/40520902899.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/burger_king_gutscheine_2020_plu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1675/files/cisco_vpn_client_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/mathematical_biology_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/caracteristicas_de_la_republica_aristocratica.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/26730448162.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/98990494025.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/vepugomipaxixipeziji.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004abd.bin
0f96573ac471046206915986dbdc9f3f006e2c8d6502b17e76d2097d3fb24d07
pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABD 3936 bytes
font_01_sfnt_off000058e7.bin
b1965583af963c2bec09dbc971bdfcf2a8a2378c9430ed072fca0c32ecefa1d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x58E7 5828 bytes
font_02_sfnt_off00006cfd.bin
759fd203cc1091c1fe645264c73e03a4f247416efaa72c0492ac1a448fd89430
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 10240 bytes