Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b58e0032e463b1…

MALICIOUS

PDF

42.8 KB Created: 2020-10-03 09:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a72f0bf539ab8c2a3e893ccc69f96f0c SHA-1: e3c7ffae8096db543e105a7ff82da72214ff9bd7 SHA-256: 35b58e0032e463b12fbf172d4da7800de54ae4ef0f7543139fff651f884be7dd
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains the string 'Scary movie 3 download mp4' and a URL that aligns with the malicious redirector heuristic. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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/strik?keyword=scary+movie+3+download+mp4 In PDF document text
    • http://files.mvhsphotography.com/uploads/1/3/0/7/130775308/momafaxifidoga-joxeburejijig-mesupimi-liroja.pdfIn PDF document text
    • http://dulav.shininglightfamily.org/uploads/1/3/0/8/130874019/1177bcd4ec0.pdfIn PDF document text
    • http://dupip.eastertopentecost.com.au/uploads/1/3/0/7/130775432/lamuvorew-zovevegef-wuwumirikikovo-jutirobewoxaxis.pdfIn PDF document text
    • http://gipilif.thatjuliegarcia.com/uploads/1/3/0/7/130775050/fokisanuli-fewavi.pdfIn PDF document text
    • http://files.beautifullybarelaser.com/uploads/1/3/1/8/131856627/suponuzuxamid.pdfIn PDF document text
    • http://fimar.mountbethelpublishing.com/uploads/1/3/0/7/130775490/vigumopituteput-didobedewi-zipuva-wovisos.pdfIn PDF document text
    • http://raxonotet.fudge4hooks.com/uploads/1/3/1/8/131871825/1736695.pdfIn PDF document text
    • http://tumumopa.housefitstl.com/uploads/1/3/1/8/131871721/nirezazu_nimuzuzokuj_sigomebokezu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7024/2460/files/free_receipt_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5765/6220/files/hampton_bay_low-voltage_120-watt_landscape_transformer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/79175513315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5393/6540/files/56803111552.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 5356 bytes
SHA-256: e8c25413ffada4ca969b11dd3e75e18c1a43c568a743440ab141a8a959701acf
font_01_sfnt_off00006eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 9848 bytes
SHA-256: 9197963af0bf8495721d9fea608613f6ee3db0c54dc71e2e5e1cca79009691b7
font_02_sfnt_off00009065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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