Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd45862a659ad2d…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 22:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0272887bb0b6320c6a233526156c18a0 SHA-1: 54c9c27361d87a127e1149461a0ba3f52dcba841 SHA-256: 0fd45862a659ad2ddb299d82380e60aaeb48af286963bc8a0ede68f7ec65649d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting an attempt to direct users to malicious content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this file is designed to lead users to harmful sites.

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=chase+paw+patrol+sheet+cake
    • http://files.aretelandscape.com/uploads/1/3/1/4/131413678/bee95b480839a.pdf
    • http://files.clevelandchamberchoir.org/uploads/1/3/1/6/131637257/0ad20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/76318909750.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/surgical_asepsis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/adulteration_in_ghee.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/79677027423.pdf
    • https://cdn.shopify.com/s/files/1/0440/6847/0936/files/apsacs_revised_date_sheet_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/dazizewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/manual_dremel_3000_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0434/2294/1351/files/informacion_nutricional_semillas_de_cha.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/wavoxal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/womikotonewazurunagolebi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d17.bin
f29020b2d22ff9400c882b5787999a765e64e2a098ea7c82f973df15f549e506
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 4832 bytes
font_01_sfnt_off00006dac.bin
d87f5758c79b4043b9a3697756097c40e508393485cc5cf72ec8aab8bb4ca61e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAC 10260 bytes
font_02_sfnt_off000090c5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 4324 bytes