Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b702e449f6c3f2…

MALICIOUS

PDF

66.7 KB Created: 2020-07-28 02:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 661108fd351a3d56a3cbaeb2d4b84cee SHA-1: 78db843791211d53cf044876a6bb9c58e395796f SHA-256: 18b702e449f6c3f2ec69813c31830b08ae8f24544af9bec6ac4bd8def2883ab5
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary redirector URL, 'https://ttraff.cc/pify?keyword=marriage+biodata+word+format+pdf+free', is flagged as malicious. This suggests the document's purpose is to manipulate search engine results or redirect users to potentially harmful content, likely delivered as a spearphishing attachment.

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=marriage+biodata+word+format+pdf+free
    • http://files.feastbythebay.org/uploads/1/3/1/3/131380087/119255.pdf
    • http://files.yamilkanoa.com/uploads/1/3/1/6/131636726/rovapudefuzafiv_sowefas_wejus.pdf
    • http://files.fuschiamoss.com/uploads/1/3/1/4/131408970/2296935.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/kuwatovagonirozufefavaroz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/mimadarofam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/63348434740.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/fovirofudixame.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/13995330221.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/muvisetamop.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/83797578575.pdf
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/woxavikesurulaluvofozetu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/vikasapuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/41661504659.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/suzojuruvizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/62597899628.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/savipij.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_off0000bfc7.bin
8e58c3c745fc74e1bd7131c225446ec2eca4a8a09c9eb1a5685a9ea6ac2557da
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC7 5072 bytes
font_01_sfnt_off0000d11c.bin
e50b69602488c02123deeb3cb866c23e59cab9b57b00a1238d4939fa49aec615
pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 14444 bytes