Malicious PDF — malware analysis report

Static analysis result for SHA-256 016f21c4a75c0021…

MALICIOUS

PDF

42.7 KB Created: 2020-10-17 19:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55a0c1923dd667630362636d7bfbbf05 SHA-1: 5e9e17be3a35da33d6367af9fa2a71f661ba5c4f SHA-256: 016f21c4a75c0021c61be79a87cdd07f31cd9511866578611da1a010d2dd1c51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file contains multiple embedded links, including one pointing to the malicious redirector 'ggtraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this URL is associated with malicious activity. The document body and embedded links suggest a link farm or phishing attempt designed to redirect users to potentially harmful content.

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://ggtraff.ru/123?keyword=guided+readers+deanna+jump
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8a97e63871f.pdf
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f87610dd477b.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8a1ed90572e.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdf
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/gotagulojivaga-pebetidubo-gonurojirupuru-gumesegekubixis.pdf
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/6960081.pdf
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/1ce0597.pdf
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/dopaviwet.pdf
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/e5f5e8382.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0501/7426/3456/files/69126573557.pdf
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/xezedum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/santa_muerte_rosary_beads.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/ridamapekejikiradu.pdf
    • https://cdn.shopify.com/s/files/1/0486/7673/3078/files/how_to_improve_speaking_english_fluently.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/13576045374.pdf
    • https://cdn.shopify.com/s/files/1/0496/2818/4739/files/vegoxubebixot.pdf
    • https://cdn.shopify.com/s/files/1/0493/4064/5570/files/85908375411.pdf
    • https://cdn.shopify.com/s/files/1/0498/0647/5421/files/thanksgiving_following_directions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0266/9087/9673/files/conjonction_francais_liste.pdf
    • https://cdn.shopify.com/s/files/1/0487/0760/0534/files/baby_lock_enlighten_serger_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ac.bin
c2623920cdbfa07d258fb30777a39eec387989679cad4571a054fca9459e4c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AC 5180 bytes
font_01_sfnt_off00007b32.bin
2a5edb11a469072de746f76091372527f97188dbbee4ee40c88d83aeac6407c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B32 10008 bytes

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