Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2990b827e0b23c…

MALICIOUS

PDF

145.7 KB Created: 2020-08-08 08:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c5f210ac24b6fb57fa421ac92f1515 SHA-1: 31a2b4cff9a8dc8e09ffe88c2e980e71f37e76e5 SHA-256: 6a2990b827e0b23cc1cb767767eadade4d97ad8c80c99847698ad70aa53f1239
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and a keyword suggesting a lure for a specific PDF topic. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=bhagwat+mahapuran+sanskrit+pdf
    • http://files.aogheliservices.com/uploads/1/3/1/0/131070651/2629876.pdf
    • http://files.tinsley-chiropractic.com/uploads/1/3/0/7/130738614/670539.pdf
    • http://files.sngservicesplus.com/uploads/1/3/1/4/131437766/xunenal.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/zotifetapezepewoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/buzukubebotiramaluranakat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/simplification_and_approximation_questions_for_ibps_po.pdf
    • https://cdn.shopify.com/s/files/1/0433/3115/8175/files/nothing_the_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3895/files/resignation_letter_sample_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/fupofaralototakezeposeta.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/gusapomudimodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/69320661685.pdf
    • https://cdn.shopify.com/s/files/1/0436/4340/4441/files/van_richten_s_guide_to_fiends.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/kuvulasakedixagawugu.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001f9ec.bin
870c132921f6c80bc9a5607fec6bfa531cd20655791b802ce1140a5d44e60d66		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F9EC 21792 bytes
font_00_sfnt_off0001b4a1.bin
35a143fc67d0558e988e2f080b233c690841babcbb2764b29369d6dae33ca81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4A1 5628 bytes
font_01_sfnt_off0001c7ab.bin
b850e935aaf604f3e1824861b6c46746957ce6d0e1401f4bf16d070b42224529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7AB 3772 bytes
font_02_sfnt_off0001d34f.bin
d2bedd554691971e153f2ef65c0cc802c27b8f40d771c34e91da87729e791561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D34F 11968 bytes

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