Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd9a8e5807a9718…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 23:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec2ab2b91f6458c0a43c8cc51d24f5d1 SHA-1: c6c0f1a6118c1495c3294c977838f9ae286f5d85 SHA-256: 7cd9a8e5807a971810458028e2e707c9d4229d5d009ab97193f6b67b7676a772
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 at 'https://ttraff.com/pify?keyword=vba+vlookup+on+different+sheet'. Another heuristic indicates a PDF link farm, suggesting an attempt to distribute or redirect to multiple malicious or spam-related documents. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=vba+vlookup+on+different+sheet
    • http://duzerore.agricanto.org/uploads/1/3/2/6/132681445/tumalagigoti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9629/1994/files/sojelijijiwovebojekope.pdf
    • https://cdn.shopify.com/s/files/1/0454/7267/8054/files/60108072029.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/90155397207.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/18038590059.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/88574918127.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/skripsi_akuntansi_pajak_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0451/6331/5349/files/38472613242.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/gamma_world_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/android_16_dragon_ball_fighterz_combos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/bofoj.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_off00006c8b.bin
63db5d1479cd43b560abf5851cb2247e41e68f09d16fe751584608a6282f6abf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 5356 bytes
font_01_sfnt_off00007ec1.bin
030f505724715c8874c7e4924c368b170b68f64f820041807d4e4569edc60e0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 10664 bytes