Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5def85f13b738e…

MALICIOUS

PDF

43.8 KB Created: 2020-08-22 11:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82457f99b5c1dad5a3eb575f00e761ce SHA-1: 253bace449321080edafd4f57b80a104dc934304 SHA-256: 6b5def85f13b738e3c4090c93a2714fa91dd874ce138a174c3952bee903bb533
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'personal development plan template leadership' and the malicious URL, suggesting a phishing or scam lure. 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.ru/pify?keyword=personal+development+plan+template+leadership
    • http://files.krisjost.com/uploads/1/3/1/3/131398145/sezim-nekobi-xibolifejusejod.pdf
    • http://files.anikadeshpande.com/uploads/1/3/1/4/131409309/296e5.pdf
    • http://files.stchadspre-school.com/uploads/1/3/1/8/131871449/zoneguzigozivukafo.pdf
    • http://files.myartisticdentist.com/uploads/1/3/1/4/131453214/ribane_vasilabofeb_dotowifixusiw_zejezurugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0423/9783/files/collections_in_java_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/vw_beetle_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/farinelli_il_castrato.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/sons_and_daughters_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/autocad_map_2010_crack_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/navonazegaxepejurivid.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/arithmetical_reasoning_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7740/files/school_dance_full_movie_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/82234290790.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/bapojililexuxa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006149.bin
d0161d9c853eeba92f3a8ee66ddffcbf6e98e3d39d086ec2a7e162e881ae8ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5048 bytes
font_01_sfnt_off0000723b.bin
005f603907d3d55cae794688bb3f48d981c47c44b5dd9badbcbff61e50a7111e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 9936 bytes
font_02_sfnt_off00009404.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9404 4324 bytes

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