Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5a34291301e0d0…

MALICIOUS

PDF

51.8 KB Created: 2020-08-15 08:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd7b002b4e57c8383905b041fd750a09 SHA-1: c2597e6aff9d799b872163ac9cd889fcda0f19d3 SHA-256: 6a5a34291301e0d0eb1e5ba49dcb377a0f204a25b0e562dea27e53d1f65a88e3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One prominent URL, 'https://ttraff.cc/pify?keyword=cricket+game+for+android+2019', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'cricket game for android 2019' and a URL that appears to be part of the malicious redirection chain. 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.cc/pify?keyword=cricket+game+for+android+2019
    • http://files.cassandradenhartog.com/uploads/1/3/2/7/132712235/1894158.pdf
    • http://nunororig.wppc-centralflorida.org/uploads/1/3/1/4/131437709/ecf2713eae2fe7.pdf
    • http://redumok.mexiitem.com/uploads/1/3/0/7/130738799/2328827.pdf
    • http://soxaja.drstephencahill.com/uploads/1/3/0/8/130813747/lumiparufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/3030/5178/files/oxford_dictionary_java_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/56499918722.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/gobegazexugejeroxojigewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/vetijutawumokefibaruwud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/nimepebezoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/6340/1877/files/java_interview_questions_for_3_years_experience.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/13298659001.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/nekagomebopapugaxiluvel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/7145273336.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/second_conditional_exercises_autoenglish.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/segegewa.pdf
    • https://cdn.shopify.com/s/files/1/0449/9708/3300/files/games_god_of_war_2_ppsspp.pdf
    • https://cdn.shopify.com/s/files/1/0431/7177/4615/files/71359851416.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/63859849267.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006976.bin
b24dd36b914604c232e99693c6139d2067aea87ee89798cdd045bfaa7a04c145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6976 5488 bytes
font_01_sfnt_off00007c0a.bin
b1dadb9d9e463c71db532dbe6ce360fce3be8f85d2912f97446f445e7e8c97ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0A 10080 bytes
font_02_sfnt_off00009eb0.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB0 16164 bytes
font_03_sfnt_off0000b3c7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C7 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.