Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9fa6435b84bfde…

MALICIOUS

PDF

49.1 KB Created: 2020-08-23 05:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d21bc9d4962828e19fdade3f386420bc SHA-1: e83d74cf62085d1cee6ba352eb4d7035e5ca346a SHA-256: fd9fa6435b84bfde85c66e97f9a0338594a062d94f63a7cd05f51e566769a582
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded URLs pointing to various PDF files, indicating a link farm strategy. One of the primary URLs, 'https://ttraff.com/pify?keyword=the+fifty+pence+guide+2019', is flagged as a known malicious redirector. This suggests the document is designed to lure users into clicking these links, potentially leading them to malicious websites or phishing pages.

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.com/pify?keyword=the+fifty+pence+guide+2019
    • http://files.janusadvisoryinc.com/uploads/1/3/1/4/131437283/519929.pdf
    • http://ligebedan.gulfcoastnstra.org/uploads/1/3/0/7/130739059/9388316.pdf
    • http://files.rbawebdesign.com/uploads/1/3/0/7/130776661/wivaxafegovobi.pdf
    • http://bobuxado.sgtnatefitness.com/uploads/1/3/2/6/132682076/gudabusekuman_puxunupagag_rokemekifolajum_temawif.pdf
    • http://bovag.highdesertcontractors.net/uploads/1/3/1/3/131379808/kibobalaxunotazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0241/files/aktu_anti_ragging_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/4922/9220/files/32830256523.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1736/files/22273921138.pdf
    • https://cdn.shopify.com/s/files/1/0435/7472/2718/files/baaghi_2_movie_ringtone_instrumental.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2817/files/wheel_horse_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/nemixuzenakozopusef.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/louder_charice_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/fundamentals_of_acoustics_kinsler_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7228/9942/files/artificial_intelligence_a_modern_approach_github.pdf
    • https://cdn.shopify.com/s/files/1/0433/4970/4854/files/brinkmann_gourmet_charcoal_smoker_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/nisivotepewobefizumiwezux.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b67.bin
636c1c0d3af1b5f53b809c93b89740408d380683c04a3a46b106588791ad1b4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 5432 bytes
font_01_sfnt_off00008df6.bin
7f02a8a8a208cf21dbc6fd85ee579e275e954c9522029f980f986800bcd744a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF6 13116 bytes

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