Malicious PDF — malware analysis report

Static analysis result for SHA-256 780cdfa4fdea9bf6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 14:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16a45fbbcbbc18064bf8a5b4fb00684f SHA-1: b5de805518891ff43ad4724636890d24c9888c9d SHA-256: 780cdfa4fdea9bf6a82bbfc4d6c619c632d140268572933ec86806a52e6ceeed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Android set navigation bar height' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning attempt to drive traffic to malicious destinations.

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=android+set+navigation+bar+height
    • http://lusife.cafe643.com.au/uploads/1/3/1/4/131407089/946642.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/67738882521.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/15724408595.pdf
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/87413692676.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/68431129536.pdf
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/vanagon_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gopamulirusakipibav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/survey_analysis_report_excel.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/alphabet_tracing_sheets_pre_k.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/tuvemiroma.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/rivawebimek.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/dugodekojanafidugozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.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_off00006056.bin
3cd3c4fa8fcab0a829c49dda3d482658132eff99d32766894f63f17eadcdbcb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 5244 bytes
font_01_sfnt_off00007228.bin
71d4df68c58c2805a6124adff3ff5a41d2bef85bb67671e37e1728edcbfa83da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7228 10284 bytes