Malicious PDF — malware analysis report

Static analysis result for SHA-256 64eac92f556d849a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 14:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1221513e2695973b301675821a1203 SHA-1: fae6e160ca662e28018622a162a202f36ab3d75c SHA-256: 64eac92f556d849afdc0cb8e50dfa48c192813316ee95faa0a0b6f0432ef1e64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though garbled, contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to trick users into clicking the link, likely leading to a malware download or phishing site.

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=whatsapp+messenger+for+windows+7+ultimate
    • http://mimiwa.rebuildhopekansas.org/uploads/1/3/1/3/131380005/3f3ac2.pdf
    • http://files.woodland50pta.com/uploads/1/3/0/9/130970016/de3dabb06fb9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/roman_mythology_trivia_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/whatsapp_app_free_for_windows_phone.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/history_of_arabic_language_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/chinese_drama_the_eternal_love_2.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/sophisticated_lady_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/fuzojuzizapegomop.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/affect_vs_effect_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/calamity_abyss_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/rupibom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8845/files/vilefonakifakugigebotevob.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/94085656994.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_off00005bb0.bin
decd84c9a695570306571868596038ad68bc414e3c2efd31c0c3235ceec2bfb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB0 5640 bytes
font_01_sfnt_off00006ed7.bin
f5f8fb78131ea924a3319824a6f81c61aa7c044b8141aca5e2135edd827e754a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED7 9784 bytes