Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1abb77369fcb5d…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 19:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f4056c8087ebf44e6a8b65e3ea7e844 SHA-1: 76bc39a0a36cd2ef67edcb58b00c95e69ad2bb63 SHA-256: ba1abb77369fcb5de40280444903b8aff4d84b54a9a219224c588529c5de45a2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Frozen fever full movie 720p' and the malicious URL, suggesting a lure for potentially pirated content. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious sites. The ML classifier also strongly indicated 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=frozen+fever+full+movie++720p
    • http://tovude.fitbodybyphyl.com/uploads/1/3/2/6/132695517/nudekuzaboforob.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/vafamizuroludevobonaxula.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/24879755499.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/secret_love_giovanni_allevi_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/42386158245.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/72221551893.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/batman_arkham_asylum_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/vuvikarajesorudovud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/70395973975.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/selobixokeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/lateduderajazolowapez.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/bukhari_shareef_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/basic_quantitative_aptitude_questions_and_answers_with_explanation.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064af.bin
89ea70902225bf719b244e977f777a3e34794ff37edd62bfa4ebbecef2d243dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5080 bytes
font_01_sfnt_off000075ff.bin
63ed46e6e46382780e5b8c9904fde3e9dffafa863a3c229eea17d7cfab42e2c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FF 10024 bytes