Malicious PDF — malware analysis report

Static analysis result for SHA-256 8204687afc090eba…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 10:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f594bae228fd6cf756f12a53a192eef SHA-1: 268745d798fe06a814f0f89cf018e545ce62d016 SHA-256: 8204687afc090eba34e3673149da2526362a7e645a51e54c49cb6d99e4ff9fa1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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=my+heart+is+beating+naa+song
    • http://files.santacruztrackclub.com/uploads/1/3/1/6/131606011/ramukikogif_lebiko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/64977965451.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/59465413100.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/46821998122.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/15277628566.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/zipikugifosipitid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/budget_spreadsheet_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/free_newsletter_templates_for_elementary_school.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/smallest_reader_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/84879934198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000579f.bin
6e670dc8df50ef55309cb773b810eec71f07ad24fea2f29d11f91d81a4f33cac
pdf-font-stream PDF embedded font (sfnt) at offset 0x579F 4948 bytes
font_01_sfnt_off0000686b.bin
a301576229b6f05be86f3e3bd404b30d37b70d8e1f24a559a542d316e646e6e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 2996 bytes
font_02_sfnt_off000074bf.bin
712c900f50d4837784cfaf4f11e0cc12413d00cb230d1dbd10f4ef743a3d26d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x74BF 10368 bytes
font_03_sfnt_off00009853.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9853 4324 bytes