Malicious PDF — malware analysis report

Static analysis result for SHA-256 02102dcf639aff4a…

MALICIOUS

PDF

50.9 KB Created: 2020-08-18 21:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa5a925465341bba1944cb6f62f96a0 SHA-1: 9dbf31481cb5c63e07d75b8abdedd84046621d17 SHA-256: 02102dcf639aff4a57d20668bd162e44cbf9b496e7f1bd0398357c238c3bb0aa
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 a redirector service known for malicious activity. The document body itself is heavily obfuscated but contains a reference to the malicious URL, suggesting an attempt to drive traffic to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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=catastrophism+theory+pdf
    • http://files.frankiegardiner.com/uploads/1/3/1/3/131384071/fekogopi.pdf
    • http://xukajetup.nacefoodshelf.org/uploads/1/3/1/1/131164104/bunativetotomi_wofeputilar_guvonanadobefu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/walking_up_stairs_sound_effect_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/derek_hull_materiales_compuestos.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/how_to_open_steam_game_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/62727269138.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/rimworld_tame_thrumbo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/90358533970.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/16046064308.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/tubamadaworijeluwajaxed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/rafunelitapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/jolebaragavovelopifeji.pdf
    • https://cdn.shopify.com/s/files/1/0434/6416/3490/files/mh_cet_2020_result_download.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_off000079a3.bin
3764859c6a49cdc7a8415c3b4f969789257475ba5f8742990fd09dac3405ac94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 5056 bytes
font_01_sfnt_off00008ae2.bin
774e42c23d589e63b0d3d57f66c4234d8bfd2618c1c5be5005d10258f3f16765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 11608 bytes
font_02_sfnt_off0000b0d4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D4 4324 bytes

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