Malicious PDF — malware analysis report

Static analysis result for SHA-256 1320224c0717c257…

MALICIOUS

PDF

42.1 KB Created: 2020-11-01 13:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1e3a0ca243693a97ccbd81cdcd6c0723 SHA-1: 8c54b829d8014f10115038cc0d321b81d9992117 SHA-256: 1320224c0717c25749e2bf9236c2c7e50303fff11ed9ecf7e908fc918bc04f5c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of embedded links, with many pointing to disposable hosting services and a known malicious redirector. This suggests the document's primary purpose is to act as a link farm, likely for SEO manipulation or to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/pify?keyword=ridgeview+middle+school+basketball In PDF document text
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/1142007.pdfIn PDF document text
    • https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/7150210.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/e32130e50a1c2b.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/45e0bd986f.pdfIn PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/4187367.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://nakoliveb.weebly.com/uploads/1/3/4/5/134503524/e2d89df72c73e.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/abec670.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/5563904.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/fd9fe9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/92087754551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a819911a-6148-42f3-a526-edd515718220/frigidaire_dishwasher_error_code_co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccdcf1d-ba13-4c3c-8858-7fb62f057780/wotasakularibirodiruka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b9bb0b-77ec-4102-a1f7-162c3a7e87e2/gta_san_andreas_sigara_ime_ifreleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e25778d-6a2c-46f2-a667-3a53d3bc05b8/vidrios_y_aluminios_en_saltillo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000656b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 5620 bytes
SHA-256: 265456de10dee9669b279164e0503b0098bc4f2bb7df09925805e7f7b81d2c92
font_01_sfnt_off00007889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7889 10508 bytes
SHA-256: ccf912d966833529841b1ddb06e5d27e5d29b0b47c33bf6e2784d8600bd883ef

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