Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d21a25eeb0a574…

MALICIOUS

PDF

49.6 KB Created: 2020-08-24 01:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ac14916c01cb6a891b43df14e95233 SHA-1: 330d4f324dd47e6a46303f8ce80781108d7f3f83 SHA-256: 69d21a25eeb0a5749c6713750f02d6b009cb2e3cf6a548d0ea75bb7fdd428c9c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=excel+2010+pivot+table+cheat+sheet, is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to URLs, reinforcing the malicious intent of linking out to external resources. The ML classifier strongly indicates maliciousness.

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=excel+2010+pivot+table+cheat+sheet
    • http://files.bbffkennels.com/uploads/1/3/2/6/132682093/da93b8aa203.pdf
    • http://files.caddisshackguideservice.com/uploads/1/3/2/6/132695586/4558637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/12993715072.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/boolean_rules.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/ds_3053_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/44823549178.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/tifomaboseruromewopilad.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/watch_underworld_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/ansell_casey_life_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/printable_january_2020_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/91380527374.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/sibun.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_off00008347.bin
1ae9a3e66bfcaf568619de8634d9ab476e946dac879fe5a7b1138f6a33a9166f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8347 5476 bytes
font_01_sfnt_off000095e9.bin
05a369197e3af44161011165cfeaea69e851c78095710271dfee469d0c98e85c
pdf-font-stream PDF embedded font (sfnt) at offset 0x95E9 10612 bytes