Malicious PDF — malware analysis report

Static analysis result for SHA-256 731395bf2e4f90ee…

MALICIOUS

PDF

48.8 KB Created: 2020-08-29 03:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17b5fe9f2a2ba9526d51153e0f2141d5 SHA-1: 7ee97d7618d4acc5ce129f7ff18704ef9e7057fe SHA-256: 731395bf2e4f90ee56df86c06078a393b38a5b3dc253dabc1f193b1514fcc8d6
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=way+of+the+four+elements+unearthed+a'. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs indicate an attempt to redirect the user to malicious sites, likely as part of a phishing or malware distribution campaign.

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/wix?keyword=way+of+the+four+elements+unearthed+a
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3241/1298/files/buku_sejarah_bani_umayyah.pdf
    • https://cdn.shopify.com/s/files/1/0461/7273/3603/files/sistema_de_actividad_humana_como_un_lenguaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/fundamentals_of_ms_excel.pdf
    • https://cdn.shopify.com/s/files/1/0460/3625/4879/files/55068199149.pdf
    • https://cdn.shopify.com/s/files/1/0433/5285/0586/files/ashirvad_swr_pipes_price_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/the_macro_economy_today.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/do_re_mi_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/africa_political_map_blank.pdf
    • https://static.usrfiles.com/ugd/b8c837_98530b8ca05547a48c03e4009db7ffc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_245ffa7f2bc344569f12a01034556000.pdf
    • https://static.usrfiles.com/ugd/b8c837_d92458ecee1c45c6b35af5bffbd129bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fac8b22f7e44a8093401ab03043d3a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_afd93b34cf5044dc8fdf7ef74441fcd7.pdf
    • https://cdn.shopify.com/s/files/1/0433/9348/2902/files/artificial_intelligence_with_python_by_prateek_joshi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/6684392393.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/fofadiragedidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/schlage_keypad_locks_user_guide_be365.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_off00007f9c.bin
7170eecbfed0495d2338f98dec62e2092242346f300e0d0d8dbfdb40cd31bb47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 5260 bytes
font_01_sfnt_off0000916e.bin
9f256868bb95ccb84e7018527391cc73fc4ba71315422773348f58647813ae6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916E 10820 bytes

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