Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dae2eeed905b96a…

MALICIOUS

PDF

51.3 KB Created: 2020-08-18 15:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f816b90605f889e300a73247ad92fb58 SHA-1: 642598e37e4fb1e96ecc871d928110216148edbf SHA-256: 5dae2eeed905b96ae377d0ed6702191c6b9e2de8e99aa3109d51e9f90ee32e6f
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bahubali+2+songs++tamil+hd, which is flagged as a redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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=bahubali+2+songs++tamil+hd
    • http://files.philoptochosofsaintanthony.org/uploads/1/3/1/3/131383434/3c03d28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/28129350362.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/astronomy_today_8th_edition_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/89108805736.pdf
    • https://cdn.shopify.com/s/files/1/0432/8469/3160/files/losapovapis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/2759833786.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/mutant_creatures_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7978/files/capteur_de_temprature_thermistance.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/felt_sheet_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8378/4601/files/79523649644.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
font_00_sfnt_off00006162.bin
12748241555f5dcc9e907b0e4184455964ed59d0741884fea3237d9f9fb8e82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 5464 bytes
font_01_sfnt_off000073be.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BE 3720 bytes
font_02_sfnt_off00007f22.bin
25623997d58de07917a4db98f842329a10c2d7f00a33abd88d0b0a8e5fa19e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F22 10016 bytes
font_03_sfnt_off0000a1bc.bin
febb8b2c74fbe72528b22fcbfbe39b6864e1b292afe726b0524a0232e5c6fb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BC 9356 bytes

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