Malicious PDF — malware analysis report

Static analysis result for SHA-256 017673f68dc352a8…

MALICIOUS

PDF

47.7 KB Created: 2020-08-23 14:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a737b325f6e7f3e34905036984ba686f SHA-1: c2de03266550a7dec16adeb676d4505260fadda3 SHA-256: 017673f68dc352a86325300330fb62b0b4a6d40a6db498bbaf7df88dfdc4e22c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that its primary purpose is to redirect users to harmful sites.

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=firewall+types+and+configuration+pdf
    • http://files.morimotodirect.com/uploads/1/3/1/4/131455475/c4442aca8e48.pdf
    • http://porevowag.twobeinchili.com/uploads/1/3/0/7/130775364/rewesofekokibisu.pdf
    • http://files.ashma.studio/uploads/1/3/1/4/131408027/gosaveju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/wonijeruxaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/cochise_stronghold_climbing_guides.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9189/files/bohemian_rhapsody_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/47391516374.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0485/files/965551091.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/cheque_mate_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/85046086619.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/ropefe.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/89348208585.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wimuwukewamofese.pdf
    • https://cdn.shopify.com/s/files/1/0441/1083/9960/files/leputexadoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c3f.bin
c9c6cfad525aa6a153b1a6d92a6bb6aea59f1a1875c01105dd8aef2c836c9750
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3F 5472 bytes
font_01_sfnt_off00008efd.bin
d7172b7141e7f02640d96d736707c7bf6388b41311eeb1cdfcbeb9f8cf0e9026
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFD 10176 bytes