Malicious PDF — malware analysis report

Static analysis result for SHA-256 04060f5c850addf2…

MALICIOUS

PDF

54.7 KB Created: 2020-08-03 16:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1df9362adbc15b4553706b7d165cb96b SHA-1: 7b1f4ef6f5a89080a06398477f3efbeeaeceaaf9 SHA-256: 04060f5c850addf2bfe4af6d39fa182a55ad2c944ba8fcbc482a8f00a4d66b09
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains a URL that mirrors the malicious redirector. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links is a strong indicator 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.cc/pify?keyword=aarti+brahmanaspati+pdf
    • http://files.qthpublishing.com/uploads/1/3/1/6/131607321/saraxa-kulatuwo-womezu-nigixemolurixo.pdf
    • http://files.techspecks.org/uploads/1/3/0/8/130813042/wukega-vidariligosud-tixiwidurez-kuxagid.pdf
    • http://files.clarkpiperepair.com/uploads/1/3/1/4/131407138/39afebec.pdf
    • http://files.sasquatchcanada.com/uploads/1/3/1/6/131637016/vowabilivox-muxop-munuju-sebuvagas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/dufabamirid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/wurazogikov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/31056369876.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/nofezu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/vupakabixidad.pdf
    • https://cdn.shopify.com/s/files/1/0439/4693/4430/files/59163698084.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/dozawa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/kurotejofoxekafupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3282/9342/files/87689606945.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/33558955929.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.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_off00007d11.bin
b0685934f82257416e695c1cc74bf6ffd60245d12f0ce21dc7282e67b3f5955f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 5376 bytes
font_01_sfnt_off00008f2a.bin
7387be19c645c374e2ad38f47ac4218ebb7ec9a268ca38842a42c381de3dd877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2A 15516 bytes
font_02_sfnt_off0000bf2e.bin
3cd744d4efc755a8e9a4d55756a6aa886b043724876210c656578c021d4bb29e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2E 3828 bytes

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