Malicious PDF — malware analysis report

Static analysis result for SHA-256 44de762d7de176ec…

MALICIOUS

PDF

38.1 KB Created: 2020-09-21 17:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc69b84a8afe902a61d2d8d624ccc004 SHA-1: 39d7a09f5c114248e930b2c7e9b9c34b283bbb5c SHA-256: 44de762d7de176ec7102b7b3537991ed0d53aec8ccd808db981bae6c1e2b61b5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious link, https://ttraff.me/wix?keyword=hayward+de3600+parts, is designed to lure users into clicking it by appearing as a search result for specific parts. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially 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.me/wix?keyword=hayward+de3600+parts
    • http://files.spaatthecolonnade.net/uploads/1/3/0/7/130739366/5634133.pdf
    • http://files.disneylandparisforgrownups.com/uploads/1/3/1/6/131637224/dce4b5f903.pdf
    • http://files.markcraiggallery.com/uploads/1/3/1/8/131871909/fetin-vewonid-jarijumux-pozinoxa.pdf
    • http://files.centrodehistoria-flul.com/uploads/1/3/1/4/131453024/472695.pdf
    • https://1be3dcd5-858d-41e3-bf71-13ce75300fa7.filesusr.com/ugd/95ea6b_b595995e67564b70821f8050085383d4.pdf?index=true
    • https://b54b7cd6-023c-47b9-8959-a3cadce1dfb7.filesusr.com/ugd/2f3ac6_84809ad1744d4455a5ed5564167f4e23.pdf?index=true
    • https://0d2ee7a3-e6ad-4781-9c1b-1459f899d5f9.filesusr.com/ugd/65d6f7_b1a3c28b062c46f196d9a75cfabcbd5e.pdf?index=true
    • https://90646c76-71b2-4d77-8951-92d5c7185f7e.filesusr.com/ugd/39cb9d_618547a752834cfeb9843a57d6879895.pdf?index=true
    • https://6b34fe4f-c6a4-450b-bb2f-3d375676da00.filesusr.com/ugd/fedf23_6d90a877249f4e8bae60f4f758c32bea.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/9083/7655/files/39425101006.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/netejolukopasuzezi.pdf
    • https://cdn.shopify.com/s/files/1/0457/5995/5100/files/xinaruxure.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/doremidudumuvijus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2505/6412/files/faburomofokalisap.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/catholic_angelology.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7472/files/coloration_au_bleu_de_mthylne.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/duzubume.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/aramark_uniforms_decatur_il.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005324.bin
1ca4163a5f15776d1424e908b140377e2583ac391aebaf30703d8b8d9312465e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5324 5536 bytes
font_01_sfnt_off00006614.bin
a5b9600fe3d4e63b11fe0f04aae40a458c72700ce6a36da5624232df24754c51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 10952 bytes

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