Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd877c431ec3a301…

MALICIOUS

PDF

42.5 KB Created: 2020-11-03 01:35:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ce3e69a0b8b628814f56728e42881941 SHA-1: 12592751d5d652293e36d29e4ea15b0c14439ae2 SHA-256: dd877c431ec3a3019ae21c235a0058e0763094ef355781a9ab5d1eb94d9b9ed5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. It also functions as a link farm, hosting numerous external PDF documents, likely to manipulate search engine results or distribute further malicious content. The primary malicious URL identified is https://ttraff.me/123?keyword=types+of+chemical+reactions+answer+key.

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/123?keyword=types+of+chemical+reactions+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f8cf47590b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5f9144056a176.pdfIn PDF document text
    • https://tibirodemoxojuf.weebly.com/uploads/1/3/4/3/134336787/napimule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec0dcf7-8a30-40a0-97be-1e630877dfed/nufekokokekijuzewiregato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab18fbd3-2f95-4ca0-bc1d-b4fc88d18ffb/godizokosedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01bed537-5013-4ed6-9f95-b4b3e79ecd76/girisafaxazebu.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/stihl_bg86c_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c683698-2659-42db-b986-8c6909578569/jizivugimomexumufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41391be6-283a-412b-a766-fdd25ffe6ac5/dd_5e_combat_superiority.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/rig_veda_bhashya_bhumika_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589d6f67-a9bc-4120-b9ee-d9b5e6b6cfbe/zomaverod.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_off000064e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 5464 bytes
SHA-256: d6005edd95b06d16c93d9e4ded99dce4e711f1ae6e1256f21ddcb5c1e9896f0c
font_01_sfnt_off00007766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 11104 bytes
SHA-256: daf1916484d97f1284f1eb7455b56abcfae1afdf6c5597e2a81cd32c91226388

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