Malicious PDF — malware analysis report

Static analysis result for SHA-256 76af04c9b9b40369…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 19:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29f540c946beb880baccace8bc4d4434 SHA-1: 16511be3ac40ab522a8514ce457ca62c755e3d7c SHA-256: 76af04c9b9b40369ad318543dcfd82d8b2f60573a51aa24421a64fd00024ac2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=install+android+sdk+command+line+tools+windows'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document also contains a mass external PDF link farm, further indicating a SEO-based malicious content distribution strategy. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify this as a phishing attempt.

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=install+android+sdk+command+line+tools+windows
    • http://files.trinitybaptistglobeaz.org/uploads/1/3/1/8/131857364/8382267.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7220/9574/files/pomerodoxulize.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/65393520913.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/88567632980.pdf
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/tabela_de_capacitores_smd.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/bfgminer_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/lorejosigome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/tavazotakekivekokonuval.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/bloomberg_market_concepts_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/83592301680.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/544610378.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_off00006109.bin
bf66b4a1a9e5841f0eeb1b2850e43268733e611368c942b7dc6cb62f327b63e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 5176 bytes
font_01_sfnt_off00007295.bin
8c5cdf9e462af73ec247165f00b921285c6b70cc307229b628490eda380ca95d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7295 13144 bytes