Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ec26febecb6630…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 01:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f557c93c74f3ecf444e6d1519f46fd6 SHA-1: 6430279cb332ec73551dd161ecc6f7405421a9ba SHA-256: 54ec26febecb6630bb3bc9587ddd09f26a48edd8e818c4d043f1a6aa19ca703b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=ajari+aku+islam+2019+full+movie'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=ajari+aku+islam+2019+full+movie
    • http://files.batigettes.com/uploads/1/3/0/9/130969525/tijatimeju.pdf
    • http://files.jasminechaneats.com/uploads/1/3/0/9/130969368/kexudupo.pdf
    • http://files.kenjorgensendesigns.com/uploads/1/3/2/6/132695477/bopujagu.pdf
    • http://files.rsgymnastics.org/uploads/1/3/0/8/130813514/bexewomanefarer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/quran_al_waqiah.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1134/files/kajonixuwulerenasokefik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/metabolism_diet.pdf
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/bootstrap_css_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/mumuka.pdf
    • https://cdn.shopify.com/s/files/1/0449/1211/5867/files/gemischte_bungen_zeiten_englisch.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/49494772613.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/nulufodowateli.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/12796930187.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/all_android_sdk_packages_offline.pdf
    • https://cdn.shopify.com/s/files/1/0448/1315/6514/files/etika_utilitarianisme.pdf
    • https://cdn.shopify.com/s/files/1/0440/7384/4888/files/wexejalepalejunoraredofe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d5.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 6744 bytes
font_01_sfnt_off000072ba.bin
8b18d1345bcafea05cc2de3b5b4e18cc21a04e9c8919312da8f58d6c6a295bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BA 5584 bytes
font_02_sfnt_off000085b8.bin
192d3ed6ccebe42d6f723bb65247fc35faa4bde8e6a739d851a2b640a63448b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B8 10544 bytes

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